UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

 Washington, D.C. 20549

 FORM 10-K

 (Mark One)

 x ANNUAL REPORT PURSUANT TO SECTION
13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the fiscal year ended December 31, 2023

or

 o TRANSITION
REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the transition period from _____ to _____

Commission file number of the issuing entity: 333-207340-04

 Central Index Key Number of the issuing entity:
0001716263

 UBS Commercial Mortgage Trust
2017-C4

 (exact name of the issuing entity as specified in its
charter)

 Central Index Key Number of the depositor: 0001532799

 UBS Commercial Mortgage
Securitization Corp.

 (exact name of the depositor as specified in its
charter)

 Central Index Key Number of the sponsor: 0001685185

 UBS AG, acting through its branch
located at 1285 Avenue of the Americas, New York, New York

 Central Index Key Number of the sponsor: 0001238163

 Soci t G n rale, New York Branch

 Central Index Key Number of the sponsor: 0001541468

 Ladder Capital Finance LLC

 Central Index Key Number of the sponsor: 0001592182

 LMF Commercial, LLC

 (formerly known as Rialto
Mortgage Finance, LLC)

 Central Index Key Number of the sponsor: 0001548567

 CIBC Inc.

 Central Index Key Number of the sponsor: 0001542256

 Natixis Real Estate Capital LLC

 New York

 (State or other jurisdiction of

 incorporation or organization of

 the issuing entity)

 38-4046694

 38-4046695

 38-7187327

 (I.R.S. Employer

 Identification Numbers)

c/o Computershare Trust Company, National Association, as agent for

 Wells Fargo Bank, National Association

 as Certificate Administrator

 9062 Old Annapolis Road

 Columbia, MD

 (Address of principal
executive offices of the issuing entity)

 21045

 (Zip Code)

 Registrant's telephone number,
including area code:

 (212) 713-2000

 Securities registered pursuant to Section 12(b) of the Act:

 Title of each class

 Trading Symbol(s)

 Name of each exchange on which registered

 None

 Securities registered pursuant to Section 12(g) of the
Act: None.

 Indicate by check mark if the registrant is a well-known
seasoned issuer, as defined in Rule 405 of the Securities Act. o Yes
No

 Indicate by check mark if the registrant is not required to
file reports pursuant to Section 13 or Section 15(d) of the Act. o Yes
No

 Indicate by check mark whether the registrant (1) has filed
all reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding 12 months (or for such shorter period
that the registrant was required to file such reports), and (2) has been
subject to such filing requirements for the past 90 days. Yes o No

 Indicate by check mark whether the registrant has submitted
electronically every Interactive Data File required to be submitted pursuant to
Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the
preceding 12 months (or for such shorter period that the registrant was
required to submit such files).

 Indicate by check mark whether the registrant is a large
accelerated filer, an accelerated filer, a non-accelerated filer, a smaller
reporting company, or an emerging growth company. See the definitions of "large
accelerated filer," "accelerated filer," "smaller reporting company," and
"emerging growth company" in Rule 12b-2 of the Exchange Act.

 Large accelerated
filer o
Accelerated filer
o

 Non-accelerated
filer

Smaller reporting
company
o

Emerging growth
company
o

 If an emerging growth company, indicate by check mark if the
registrant has elected not to use the extended transition period for complying
with any new or revised financial accounting standards provided pursuant to
Section 13(a) of the Exchange Act. o

 Indicate by check mark whether the registrant has filed a
report on and attestation to its management's assessment of the effectiveness
of its internal control over financial reporting under Section 404(b) of the
Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm
that prepared or issued its audit report. o

 If securities are registered pursuant to Section 12(b) of the
Act, indicate by check mark whether the financial statements of the registrant
included in the filing reflect the correction of an error to previously issued
financial statements. o

 Indicate by check mark whether any of those error corrections
are restatements that required a recovery analysis of incentive-based
compensation received by any of the registrant's executive officers during the
relevant recovery period pursuant to §240.10D-1(b). o

 Indicate by check mark whether the registrant is a shell
company (as defined in Rule 12b-2 of the Act). o Yes No

 State the aggregate market value of the voting and non-voting
common equity held by non-affiliates computed by reference to the price at
which the common equity was last sold, or the average bid and asked price of
such common equity, as of the last business day of the registrant's most
recently completed second fiscal quarter.

 Indicate by check mark whether the registrant has filed all
documents and reports required to be filed by Section 12, 13 or 15(d) of the
Securities Exchange Act of 1934 subsequent to the distribution of securities
under a plan confirmed by a court. o
Yes o
No

 Indicate the number of shares outstanding of each of the
registrant's classes of common stock, as of the latest practicable date.

 DOCUMENTS INCORPORATED BY REFERENCE

 List hereunder the following documents if incorporated by
reference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) into
which the document is incorporated: (1) Any annual report to security holders;
(2) Any proxy or information statement; and (3) Any prospectus filed pursuant
to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents
should be clearly described for identification purposes (e.g., annual report to
security holders for fiscal year ended December 24, 1980).

 EXPLANATORY NOTES

 The District Mortgage Loan, the Meridian
Sunrise Village Mortgage Loan, the Bank of America Office Campus Building 600
Mortgage Loan and the DoubleTree Berkeley Marina Mortgage Loan, which
constituted approximately 4.9%, 3.1%, 2.4% and 1.7%, respectively, of the asset
pool of the issuing entity as of its cut-off date, are each an asset of the
issuing entity and are each part of a loan combination that includes (a) with
respect to The District Mortgage Loan, three other pari passu loans,
which are not assets of the issuing entity, (b) with respect to the Meridian
Sunrise Village Mortgage Loan, two other pari passu loans, which are not
assets of the issuing entity, (c) with respect to the Bank of America Office
Campus Building 600 Mortgage Loan, one other pari passu loan, which is
not an asset of the issuing entity and (d) with respect to the DoubleTree
Berkeley Marina Mortgage Loan, three other pari passu loans, which are
not assets of the issuing entity. These loan combinations, including The
District Mortgage Loan, the Meridian Sunrise Village Mortgage Loan, the Bank of
America Office Campus Building 600 Mortgage Loan and the DoubleTree Berkeley
Marina Mortgage Loan, are being serviced and administered pursuant to the
Pooling and Servicing Agreement, which is incorporated by reference as Exhibit
4.1 to this Annual Report on Form 10-K.

Exhibit Index) with respect to the 245 Park Avenue Mortgage Loan, which
constituted approximately 3.8% of the asset pool of the issuing entity as of
its cut-off date. The 245 Park Avenue Mortgage Loan is an asset of the
issuing entity and is part of a loan combination that includes the 245 Park
Avenue Mortgage Loan, twenty-one other pari passu loans and five
subordinate companion loans, which are not assets of the issuing entity. A pari
passu portion of the loan combination was securitized in the 245 Park
Avenue Trust 2017-245P transaction (the " 245 Park Avenue Trust 2017-245P
Transaction "). This loan combination, including the 245 Park Avenue
Mortgage Loan, is being serviced and administered pursuant to the trust and servicing
agreement for the 245 Park Avenue Trust 2017-245P Transaction, which is
incorporated by reference as Exhibit 4.2 to this Annual Report on Form 10-K.

Exhibit Index) with respect to the Del Amo Fashion Center Mortgage Loan, which
constituted approximately 0.6% of the asset pool of the issuing entity as of
its cut-off date. The Del Amo Fashion Center Mortgage Loan is an asset of
the issuing entity and is part of a loan combination that includes the Del Amo
Fashion Center Mortgage Loan, thirty-two other pari passu loans and
twelve subordinate companion loans, which are not assets of the issuing entity.
A pari passu portion of the loan combination was securitized in the Del
Amo Fashion Center Trust 2017-AMO transaction (the " DAFC 2017-AMO
Transaction "). This loan combination, including the Del Amo Fashion Center
Mortgage Loan, is being serviced and administered pursuant to the trust and
servicing agreement for the DAFC 2017-AMO Transaction, which is incorporated by
reference as Exhibit 4.3 to this Annual Report on Form 10-K.

 The Park West Village Mortgage
Loan and the TZA Multifamily Portfolio I Mortgage Loan, each previously an
asset of the issuing entity, were not assets of the issuing entity during the
reporting period and are omitted from this Annual Report on Form 10-K and will
be omitted from subsequent Annual Reports on Form 10-K.

Exhibit Index) with respect to the 237 Park Avenue Mortgage Loan, which
constituted approximately 6.1% of the asset pool of the issuing entity as of
its cut-off date. The 237 Park Avenue Mortgage Loan is an asset of the issuing
entity and is part of a loan combination that includes the 237 Park Avenue
Mortgage Loan, twelve other pari passu loans and four subordinate
companion loans, which are not assets of the issuing entity. A pari passu
portion of the loan combination was securitized in the MSSG Trust 2017-237P
transaction (the " MSSG Trust 2017-237P Transaction "). This loan
combination, including the 237 Park Avenue Mortgage Loan, is being serviced and
administered pursuant to the trust and servicing agreement for the MSSG Trust
2017-237P Transaction, which is incorporated by reference as Exhibit 4.4 to
this Annual Report on Form 10-K.

Exhibit Index) with respect to the JW Marriott Chicago Mortgage Loan, which
constituted approximately 1.3% of the asset pool of the issuing entity as of
its cut-off date. The JW Marriott Chicago Mortgage Loan is an asset of
the issuing entity and is part of a loan combination that includes the JW
Marriott Chicago Mortgage Loan, two other pari passu loans and three
subordinate companion loans, which are not assets of the issuing entity. A pari
passu portion of the loan combination was securitized in the CSAIL 2017-CX9
Commercial Mortgage Trust transaction, Commission File Number 333-207361-06
(the " CSAIL 2017-CX9 Transaction "). This loan combination, including the
JW Marriott Chicago Mortgage Loan, is being serviced and administered pursuant
to the pooling and servicing agreement for the CSAIL 2017-CX9 Transaction,
which is incorporated by reference as Exhibit 4.5 to this Annual Report on Form
10-K.

Exhibit Index) with respect to the 50 Varick Street Mortgage Loan, which
constituted approximately 3.1% of the asset pool of the issuing entity as of
its cut-off date. The 50 Varick Street Mortgage Loan is an asset of the
issuing entity and is part of a loan combination that includes the 50 Varick
Street Mortgage Loan and two other pari passu loans, which are not
assets of the issuing entity. This loan combination, including the 50 Varick
Street Mortgage Loan, was serviced under the Pooling and Servicing Agreement
for the issuing entity prior to the closing of the securitization of a pari
passu portion of the 50 Varick Street loan combination in the UBS
Commercial Mortgage Trust 2017-C5 transaction, Commission File Number
333-207340-05 (the " UBS 2017-C5 Transaction "). After the closing
of the UBS 2017-C5 Transaction on November 16, 2017, this loan combination,
including the 50 Varick Street Mortgage Loan was, and will continue to be,
serviced and administered pursuant to the pooling and servicing agreement with
respect to the UBS 2017-C5 Transaction, which is incorporated by reference as
Exhibit 4.6 to this Annual Report on Form 10-K.

Exhibit Index) with respect to the Macedonia Commons Mortgage Loan, which
constituted approximately 2.0% of the asset pool of the issuing entity as of
its cut-off date. The Macedonia Commons Mortgage Loan is an asset of the
issuing entity and is part of a loan combination that includes the Macedonia
Commons Mortgage Loan and one other pari passu loan, which is not an
asset of the issuing entity. This loan combination, including the Macedonia
Commons Mortgage Loan, was serviced under the Pooling and Servicing Agreement
for the issuing entity prior to the closing of the securitization of the other pari
passu portion of the Macedonia Commons loan combination in the Wells Fargo
Commercial Mortgage Trust 2017-C41 transaction, Commission File Number
333-206677-20 (the " WFCM 2017-C41 Transaction "). After the closing
of the WFCM 2017-C41 Transaction on November 30, 2017, this loan combination,
including the Macedonia Commons Mortgage Loan was, and will continue to be,
serviced and administered pursuant to the pooling and servicing agreement with
respect to the WFCM 2017-C41 Transaction, which is incorporated by reference as
Exhibit 4.7 to this Annual Report on Form 10-K.

 The master servicer of a pooling
and servicing agreement or trust and servicing agreement also functions as the
primary servicer of the related mortgage loans serviced and administered
pursuant to such agreement unless a separate primary servicer is identified
herein. If this report does not identify a separate primary servicer, the
servicer compliance statement provided by the master servicer under any such
agreement also encompasses its responsibilities as primary servicer of the
related mortgage loan or mortgage loans.

 Wells Fargo Bank, National
Association is the master servicer and certificate administrator of the
mortgage loans serviced under the Pooling and Servicing Agreement, the primary
servicer of the 245 Park Avenue Mortgage Loan and the Macedonia Commons
Mortgage Loan and the primary servicer and special servicer of the 237 Park
Avenue Mortgage Loan. As a result, Wells Fargo Bank, National Association is a
"servicer" as defined in Item 1108(a)(2)(iii) of Regulation AB, in the
capacities described above, because it is servicing mortgage loans that
constituted 10% or more of the assets of the issuing entity as of its cut-off
date. The assessments of compliance with applicable servicing criteria,
accountants' attestation reports and servicer compliance statements delivered
by Wells Fargo Bank, National Association in the capacities described above are
listed in the Exhibit Index.

 Wells Fargo Bank, National Association
is the custodian of the mortgage loans serviced under the Pooling and Servicing
Agreement, the 237 Park Avenue Mortgage Loan, the 245 Park Avenue Mortgage
Loan, the 50 Varick Street Mortgage Loan, the Macedonia Commons Mortgage Loan,
the JW Marriott Chicago Mortgage Loan and the Del Amo Fashion Center Mortgage
Loan. As a result, Wells Fargo Bank, National Association is a servicing
function participant in the capacities described above, because it is servicing
mortgage loans that constituted 5% or more of the assets of the issuing entity
as of its cut-off date. The assessments of compliance with applicable servicing
criteria and accountants' attestation reports delivered by Wells Fargo Bank,
National Association in the capacities described above are listed in the
Exhibit Index.

 Rialto Capital Advisors, LLC is
the special servicer of the mortgage loans serviced under the Pooling and
Servicing Agreement and the JW Marriott Chicago Mortgage Loan. As a result,
Rialto Capital Advisors, LLC is a "servicer" as defined in Item 1108(a)(2)(iii)
of Regulation AB, in the capacities described above, because it is servicing
mortgage loans that constituted 10% or more of the assets of the issuing entity
as of its cut-off date. The assessments of compliance with applicable servicing
criteria, accountants' attestation reports and servicer compliance statements
delivered by Rialto Capital Advisors, LLC in the capacities described above are
listed in the Exhibit Index.

 Situs
Holdings, LLC, is the special servicer of the Fairmount at Brewerytown Mortgage
Loan and the 245 Park Avenue Mortgage Loan and Situs Holdings, LLC, successor
to Cohen Financial, a Division of Truist Bank, successor by merger to SunTrust
Bank is the special servicer of the Del Amo Fashion Center Mortgage Loan.
These mortgage loans constitute more than 5%, but less than 10%, of the pool
assets of the issuing entity. Therefore, the Depositor included in this
Annual Report on Form 10-K an assessment of compliance with applicable
servicing criteria for Situs Holdings, LLC and an accountants' attestation
report pursuant to Item 1122 of Regulation AB because Situs Holdings, LLC is
servicing more than 5% of the pool assets. However, the Depositor is not
required to include in this Annual Report on Form 10-K a servicer compliance
statement pursuant to Item 1123 of Regulation AB of Situs Holdings, LLC because
Situs Holdings, LLC is an unaffiliated servicer servicing less than 10% of pool
assets.

 Pentalpha Surveillance LLC
is the operating advisor of the mortgage loans serviced under the Pooling and
Servicing Agreement and the JW Marriott Chicago Mortgage Loan. As a
result, Pentalpha Surveillance LLC is a servicing function participant in the
capacities described above, because it is servicing mortgage loans that
constituted 5% or more of the assets of the issuing entity as of its cut-off
date. The assessments of compliance with applicable servicing criteria and
accountants' attestation reports delivered by Pentalpha Surveillance LLC in the
capacities described above are listed in the Exhibit Index.

 BellOak, LLC is the operating
advisor of the 245 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage
Loan. As a result, BellOak, LLC is a servicing function participant in
the capacities described above, because it is servicing mortgage loans that
constituted 5% or more of the assets of the issuing entity as of its cut-off
date. The assessments of compliance with applicable servicing criteria and
accountants' attestation reports delivered by BellOak, LLC in the capacities
described above are listed in the Exhibit Index.

 Park Bridge Lender Services LLC is
the operating advisor of the 237 Park Avenue Mortgage Loan, the 50 Varick
Street Mortgage Loan and the Del Amo Fashion Center Mortgage Loan. As a
result, Park Bridge Lender Services LLC is a servicing function participant in
the capacities described above, because it is servicing mortgage loans that
constituted 5% or more of the assets of the issuing entity as of its cut-off
date. The assessments of compliance with applicable servicing criteria and
accountants' attestation reports delivered by Park Bridge Lender Services LLC
in the capacities described above are listed in the Exhibit Index.

 Wells Fargo Bank, National
Association acts as trustee of the JW Marriott Chicago Mortgage Loan and the 50
Varick Street Mortgage Loan. Pursuant to the pooling and servicing
agreement for the CSAIL 2017-CX9 Transaction and the pooling and servicing
agreement for the UBS 2017-C5 Transaction, the trustee is required to provide
an assessment of compliance with applicable servicing criteria solely with
respect to Item 1122(d)(2)(iii) of Regulation AB (regarding advances of funds
or guarantees regarding collections, cash flows or distributions, and any
interest or other fees charged for such advances, are made, reviewed and
approved as specified in the transaction agreements). However, during the
reporting period, the trustee did not perform any servicing function with
respect to the servicing criteria specified in Item 1122(d)(2)(iii) of
Regulation AB. The master servicer or the special servicer, to the extent
required, performed the servicing function identified with respect to Item
1122(d)(2)(iii) of Regulation AB, and each such party included Item
1122(d)(2)(iii) of Regulation AB in the assessment of compliance with
applicable servicing criteria and accountant's attestation report for the
subject transaction. As a result, this Annual Report on Form 10-K does
not include an assessment of compliance with applicable servicing criteria of
the trustee. One or more other servicers of the JW Marriott Chicago Mortgage
Loan and the 50 Varick Street Mortgage Loan have delivered one or more
assessments of compliance with respect to Item 1122(d)(2)(iii) of Regulation
AB.

 Wilmington Trust, National
Association acts as trustee of the mortgage loans serviced under the
Pooling and Servicing Agreement, the 245 Park Avenue Mortgage Loan, the Del Amo
Fashion Center Mortgage Loan, the 237 Park Avenue Mortgage Loan and the
Macedonia Commons Mortgage Loan. Pursuant to the Pooling and Servicing
Agreement, the trust and servicing agreement for the 245 Park Avenue Trust
2017-245P Transaction, the trust and servicing agreement for the DAFC 2017-AMO
Transaction, the trust and servicing agreement for the MSSG Trust 2017-237P
Transaction and the pooling and servicing agreement for the WFCM 2017-C41
Transaction, the trustee is required to provide an assessment of compliance
with applicable servicing criteria solely with respect to Item 1122(d)(2)(iii)
of Regulation AB (regarding advances of funds or guarantees regarding
collections, cash flows or distributions, and any interest or other fees
charged for such advances, are made, reviewed and approved as specified in the
transaction agreements). However, during the reporting period, the trustee did
not perform any servicing function with respect to the servicing criteria
specified in Item 1122(d)(2)(iii) of Regulation AB. The master servicer
or the special servicer, to the extent required, performed the servicing
function identified with respect to Item 1122(d)(2)(iii) of Regulation AB, and
each such party included Item 1122(d)(2)(iii) of Regulation AB in the
assessment of compliance with applicable servicing criteria and accountant's
attestation report for the subject transaction. As a result, this Annual
Report on Form 10-K does not include an assessment of compliance with
applicable servicing criteria of the trustee. One or more other servicers
of the mortgage loans serviced under the Pooling and Servicing Agreement,
the 245 Park Avenue Mortgage Loan, the Del Amo Fashion Center Mortgage Loan,
the 237 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage Loan have
delivered one or more assessments of compliance with respect to Item
1122(d)(2)(iii) of Regulation AB.

 This Annual Report on Form 10-K
includes assessments of compliance with applicable servicing criteria and
accountants' attestation reports from CoreLogic Solutions, LLC. This
entity was engaged by the master servicer under the Pooling and Servicing
Agreement and the primary servicer of the 245 Park Avenue Mortgage Loan, the
237 Park Avenue Mortgage Loan and the Macedonia Commons Mortgage Loan to remit
tax payments received from the escrow accounts of borrowers to local taxing
authorities, to report tax amounts due, to verify tax parcel information, and
to verify non-escrow tax payments. These servicing functions are included
within the servicing criteria set forth in Items 1122(d)(4)(xi) and
1122(d)(4)(xii) of Regulation AB. Therefore, under the principles-based
definition of "servicer" set forth in Item 1101(j) of Regulation AB that looks
to the functions that an entity performs, this vendor is a "servicer" for the
purposes of Item 1122 of Regulation AB. See Compliance and
Disclosure Interpretations, Section 301.01 (Item 1101(j)).

 This Annual Report on Form 10-K includes an assessment of
compliance with applicable servicing criteria, accountants' attestation report
and servicer compliance statement from Computershare Trust Company, National
Association (" CTCNA "). CTCNA was engaged by Wells Fargo Bank,
National Association (" Wells Fargo "), in its capacity as certificate
administrator and custodian, to perform certain specified servicing functions
identified in the assessment of compliance with applicable servicing criteria
and accountants' attestation reports. Wells Fargo engaged CTCNA in
connection with the sale of Wells Fargo's corporate trust services business to
CTCNA and its affiliates. Further, under the principles-based definition
of "servicer" set forth in Item 1101(j) of Regulation AB that looks to the
functions that an entity performs, this party is a "servicer" for the purposes
of Item 1123 of Regulation AB. See Compliance and Disclosure
Interpretations, Section 301.01 (Item 1101(j)).

 The assessments of
compliance with applicable servicing criteria, accountants' attestation reports
and servicer compliance statements of the certificate administrator of the 245
Park Avenue Mortgage Loan, the Del Amo Fashion Center Mortgage Loan, the 237
Park Avenue Mortgage Loan, the JW Marriott Chicago Mortgage Loan, the 50 Varick
Street Mortgage Loan and the Macedonia Commons Mortgage Loan are omitted from
this Annual Report on Form 10-K as the certificate administrator pursuant to
the related pooling and servicing agreement or trust and servicing agreement
does not perform any activities that address servicing criteria with respect to
the issuing entity and because they are each not a "servicer" that meets the
criteria in Item 1108(a)(2)(i) through (iii) of Regulation AB.

 With respect
to the pari passu loan combinations that include the 245 Park Avenue
Mortgage Loan, the Del Amo Fashion Center Mortgage Loan, the JW Marriott
Chicago Mortgage Loan, the Fairmount at Brewerytown Mortgage Loan, the 50 Varick
Street Mortgage Loan and the Macedonia Commons Mortgage Loan, (i) the reports
on assessment of compliance with servicing criteria and attestation reports on
assessment of compliance with servicing criteria of Midland Loan Services, a
Division of PNC Bank, National Association as primary servicer of the 50 Varick
Street Mortgage Loan and special servicer of the 50 Varick Street Mortgage Loan
prior to May 5, 2023, KeyBank National Association as primary servicer of the
Del Amo Fashion Center Mortgage Loan and the JW Marriott Chicago Mortgage Loan,
K-Star Asset Management LLC as special servicer of the 50 Varick Street
Mortgage Loan on and after May 5, 2023 and Argentic Services Company LP as
special servicer of the Macedonia Commons Mortgage Loan, listed on the Exhibit
Index are omitted from this Annual Report on Form 10-K as they are not required
to be included on this Annual Report on Form 10-K per Instruction 3 to Item
1122 of Regulation AB because they are parties performing activities that
address servicing criteria relating to 5% or less of the assets of the issuing
entity; and (ii) the servicer compliance statements of Situs Holdings,
LLC as special servicer of the Fairmount at Brewerytown Mortgage Loan and the
245 Park Avenue Mortgage Loan and Situs Holdings, LLC, successor to Cohen
Financial, a Division of Truist Bank, successor by merger to SunTrust Bank as
special servicer of the Del Amo Fashion Center Mortgage Loan, KeyBank National
Association as primary servicer of the Del Amo Fashion Center Mortgage Loan and
the JW Marriott Chicago Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association as primary servicer of the 50 Varick Street Mortgage
Loan and as special servicer of the 50 Varick Street Mortgage Loan prior to May
5, 2023, K-Star Asset Management LLC as special servicer of the 50 Varick
Street Mortgage Loan on and after May 5, 2023 and Argentic Services Company LP
as special servicer of the Macedonia Commons Mortgage Loan, listed on the
Exhibit Index are omitted from this Annual Report on Form 10-K as they are not
required by Item 1123 of Regulation AB to be included on this Annual Report on
Form 10-K because they are each an unaffiliated party that is not a "servicer"
that meets the criteria in Item 1108(a)(2)(i) through (iii) of Regulation AB.

 Item 1. Business.

 Item 1A. Risk Factors.

 Item 1B. Unresolved Staff Comments.

 None.

 Item 1C. Cybersecurity.

 Item 2. Properties.

 Item 3. Legal Proceedings.

 Item 4. Mine Safety Disclosures.

 Item 5. Market for Registrant's Common Equity,
Related Stockholder Matters and Issuer Purchases of Equity Securities.

 Item 6. [Reserved]

 Item 7. Management's Discussion and Analysis of Financial
Condition and Results of Operations.

 Item 7A. Quantitative and Qualitative Disclosures
About Market Risk.

 Item 8. Financial Statements and Supplementary Data.

 Item 9. Changes in and Disagreements With
Accountants on Accounting and Financial Disclosure.

 Item 9A. Controls and Procedures.

 Item 9B. Other Information.

 None.

 Item 9C. Disclosure Regarding Foreign Jurisdictions
that Prevent Inspections.

 None.

 Item 10. Directors, Executive Officers and Corporate
Governance.

 Item 11. Executive Compensation.

 Item 12. Security Ownership of Certain Beneficial
Owners and Management and Related Stockholder Matters.

 Item 13. Certain Relationships and Related
Transactions, and Director Independence.

 Item 14. Principal Accountant Fees and Services.

 ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB

 Item 1112(b) of Regulation AB, Significant Obligor
Financial Information.

 No single obligor represents 10% or more of the pool assets
held by the issuing entity.

 Item 1114(b)(2) of Regulation AB, Significant Enhancement
Provider Financial Information.

 No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction as
described under Item 1114(a) of Regulation AB.

 Item 1115(b) of Regulation AB, Certain Derivatives
Instruments (Financial Information).

 No entity or group of affiliated entities provides any
derivative instruments or other support for the certificates within this
transaction as described under Item 1115 of Regulation AB.

 Item 1117 of Regulation AB, Legal Proceedings.

 The registrant knows of no material pending legal proceeding
involving the trust or any party related to the trust, other than routine
litigation incidental to the duties of those respective parties, and the
following, with respect to Wells Fargo Bank, National Association, as trustee,
certificate administrator and custodian.

 In December 2014, Phoenix Light SF
Limited (Phoenix Light) and certain related entities filed a complaint in the
United States District Court for the Southern District of New York alleging
claims against Wells Fargo Bank, N.A., in its capacity as trustee for a number
of residential mortgage-backed securities (RMBS) trusts. Complaints raising
similar allegations have been filed by Commerzbank AG in the Southern District
of New York, IKB International and IKB Deutsche Industriebank (together, IKB)
in New York state court, and Park Royal I LLC and Park Royal II LLC in New York
state court. In each case, the plaintiffs allege that Wells Fargo Bank, N.A.,
as trustee, caused losses to investors, and plaintiffs assert causes of action
based upon, among other things, the trustee's alleged failure to notify and
enforce repurchase obligations of mortgage loan sellers for purported breaches
of representations and warranties, notify investors of alleged events of
default, and abide by appropriate standards of care following alleged events of
default. In July 2022, the district court dismissed Phoenix Light's claims and
certain of the claims asserted by Commerzbank AG, and subsequently entered
judgment in each case in favor of Wells Fargo Bank, N.A. In August 2022,
Phoenix Light and Commerzbank AG each appealed the district court's decision to
the United States Court of Appeals for the Second Circuit. Phoenix Light
dismissed its appeal in May 2023, terminating its case. In November 2023, Wells
Fargo Bank, N.A. entered into an agreement with IKB to resolve IKB's claims.
Wells Fargo Bank, N.A. previously settled two class actions filed by
institutional investors and an action filed by the National Credit Union
Administration with similar allegations.

 Item 1119 of Regulation AB, Affiliations and Certain
Relationships and Related Transactions.

 The information regarding this Item has been previously
provided in the prospectus of the Registrant relating to the issuing entity
filed on October 18, 2017 pursuant to Rule 424(b)(2).

 Item 1122 of Regulation AB, Compliance with Applicable
Servicing Criteria.

assessments of compliance with respect to the mortgage loans are attached
hereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit Z
to the Pooling and Servicing Agreement incorporated by reference as Exhibit 4.1
to this Annual Report on Form 10-K is a chart identifying the entities
participating in a servicing function for the transaction responsible for each
applicable servicing criteria set forth in Item 1122(d).

assessments of compliance with respect to the 245 Park Avenue Mortgage Loan,
which is being serviced and administered pursuant to the trust and servicing
agreement for the 245 Park Avenue Trust 2017-245P Transaction, are attached
hereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L
to the trust and servicing agreement for the 245 Park Avenue Trust 2017-245P
Transaction incorporated by reference as Exhibit 4.2 to this Annual Report on
Form 10-K is a chart identifying the entities participating in a servicing
function for the 245 Park Avenue Trust 2017-245P Transaction responsible for
each applicable servicing criteria set forth in Item 1122(d).

assessments of compliance with respect to the Del Amo Fashion Center Mortgage
Loan, which is being serviced and administered pursuant to the trust and
servicing agreement for the DAFC 2017-AMO Transaction, are attached hereto
under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L to the
trust and servicing agreement for the DAFC 2017-AMO Transaction incorporated by
reference as Exhibit 4.3 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the DAFC
2017-AMO Transaction responsible for each applicable servicing criteria set
forth in Item 1122(d).

assessments of compliance with respect to the 237 Park Avenue Mortgage Loan,
which is being serviced and administered pursuant to the trust and servicing
agreement for the MSSG Trust 2017-237P Transaction, are attached hereto under
Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L to the trust
and servicing agreement for the MSSG Trust 2017-237P Transaction incorporated
by reference as Exhibit 4.4 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the MSSG
Trust 2017-237P Transaction responsible for each applicable servicing criteria
set forth in Item 1122(d).

assessments of compliance with respect to the JW Marriott Chicago Mortgage
Loan, which is being serviced and administered pursuant to the pooling and
servicing agreement for the CSAIL 2017-CX9 Transaction, are attached hereto
under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit AA to the
pooling and servicing agreement for the CSAIL 2017-CX9 Transaction incorporated
by reference as Exhibit 4.5 to this Annual Report on Form 10-K is a chart
identifying the entities participating in a servicing function for the CSAIL
2017-CX9 Transaction responsible for each applicable servicing criteria set forth
in Item 1122(d).

assessments of compliance with respect to the 50 Varick Street Mortgage Loan,
which is being serviced and administered pursuant to the pooling and servicing
agreement for the UBS 2017-C5 Transaction, are attached hereto under Item 15 to
this Annual Report on Form 10-K. Attached as Exhibit Z to the pooling and
servicing agreement for the UBS 2017-C5 Transaction incorporated by reference
as Exhibit 4.6 to this Annual Report on Form 10-K is a chart identifying the
entities participating in a servicing function for the UBS 2017-C5 Transaction
responsible for each applicable servicing criteria set forth in Item 1122(d).

assessments of compliance with respect to the Macedonia Commons Mortgage Loan,
which is being serviced and administered pursuant to the pooling and servicing
agreement for the WFCM 2017-C41 Transaction, are attached hereto under Item 15
to this Annual Report on Form 10-K. Attached as Exhibit AA to the pooling and
servicing agreement for the WFCM 2017-C41 Transaction incorporated by reference
as Exhibit 4.7 to this Annual Report on Form 10-K is a chart identifying the
entities participating in a servicing function for the WFCM 2017-C41
Transaction responsible for each applicable servicing criteria set forth in Item
1122(d).

 Item 1123 of Regulation AB, Servicer Compliance Statement.

 The servicer compliance statements are attached as Exhibits
to this Annual Report on Form 10-K.

 Item 15. Exhibit and Financial Statement Schedules

 (a) The following is a list of documents filed as part of
this Annual Report on Form 10-K:

 (1) Not applicable

 (2) Not applicable

 (3) See below

 4.1
 Pooling and Servicing Agreement, dated as of October 1,
2017, by and among UBS Commercial Mortgage Securitization Corp., as Depositor,
Wells Fargo Bank, National Association, as Master Servicer, Rialto Capital
Advisors, LLC, as Special Servicer, AEGON USA Realty Advisors, LLC, as
Fairmount at Brewerytown Special Servicer, Wells Fargo Bank, National
Association, as Certificate Administrator, Wilmington Trust, National
Association, as Trustee, and Pentalpha Surveillance LLC, as Operating Advisor
and as Asset Representations Reviewer (filed as Exhibit 4.1 to the registrant's
Current Report on Form 8-K/A filed on November 22, 2017 under Commission File
No. 333-207340-04 and incorporated by reference herein).

 4.2
 Trust and Servicing Agreement, dated as of May 30, 2017,
by and among J.P. Morgan Chase Commercial Mortgage Securities Corp., as
Depositor, Wells Fargo Bank, National Association, as Servicer, AEGON USA
Realty Advisors, LLC, as Special Servicer, Wells Fargo Bank, National
Association, as Certificate Administrator, Wilmington Trust, National
Association, as Trustee, and Trimont Real Estate Advisors, LLC, as Operating
Advisor (filed as Exhibit 4.4 to the registrant's Current Report on Form 8-K
filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein).

 4.3
 Trust and Servicing Agreement, dated as of June 20, 2017,
by and among Banc of America Merrill Lynch Large Loan, Inc., as Depositor,
KeyBank National Association, as Servicer, Cohen Financial, a Division of
Truist Bank (f/k/a Cohen Financial, a Division of SunTrust Bank), as Special
Servicer, Wells Fargo Bank, National Association, as Certificate Administrator,
Wilmington Trust, National Association, as Trustee, and Park Bridge Lender
Services LLC, as Operating Advisor (filed as Exhibit 4.6 to the registrant's
Current Report on Form 8-K filed on October 18, 2017 under Commission File No.

 4.4
 Trust and Servicing Agreement, dated as of August 9,
2017, by and among Morgan Stanley Capital I Inc., as Depositor, Wells Fargo
Bank, National Association, as Servicer, Wells Fargo Bank, National
Association, as Special Servicer, Wilmington Trust, National Association, as
Trustee, Wells Fargo Bank, National Association, as Certificate Administrator
and Custodian, and Park Bridge Lender Services LLC, as Operating Advisor (filed
as Exhibit 4.2 to the registrant's Current Report on Form 8-K filed on October
18, 2017 under Commission File No. 333-207340-04 and incorporated by reference
herein).

 4.5
 Pooling and Servicing Agreement, dated as of September 1,
2017, by and among Credit Suisse Commercial Mortgage Securities Corp., as
Depositor, KeyBank National Association, as Master Servicer, Rialto Capital
Advisors, LLC, as Special Servicer, Wells Fargo Bank, National Association, as
Certificate Administrator and as Trustee, and Pentalpha Surveillance LLC, as
Operating Advisor and as Asset Representations Reviewer (filed as Exhibit 4.5
to the registrant's Current Report on Form 8-K filed on October 18, 2017 under
Commission File No. 333-207340-04 and incorporated by reference herein).

 4.6
 Pooling and Servicing Agreement, dated as of November 1,
2017, by and among UBS Commercial Mortgage Securitization Corp., as Depositor,
Midland Loan Services, a Division of PNC Bank, National Association, as Master
Servicer and as Special Servicer, Wells Fargo Bank, National Association, as
Certificate Administrator, as Cayman Agent and as Trustee, and Park Bridge
Lender Services LLC, as Operating Advisor and as Asset Representations Reviewer
(filed as Exhibit 4.1 to the registrant's Current Report on Form 8-K/A filed on
December 5, 2017 under Commission File No. 333-207340-04 and incorporated by

 4.7
 Pooling and Servicing Agreement, dated as of November 1,
2017, by and among Wells Fargo Commercial Mortgage Securities, Inc., as
Depositor, Wells Fargo Bank, National Association, as Master Servicer, LNR
Partners, LLC, as Special Servicer, Wells Fargo Bank, National Association, as
Certificate Administrator, Wilmington Trust, National Association, as Trustee,
and Trimont Real Estate Advisors, LLC, as Operating Advisor and as Asset
Representations Reviewer (filed as Exhibit 4.1 to the registrant's Current
Report on Form 8-K filed on December 5, 2017 under Commission File No.

 4.8
 Agreement Between Note Holders, dated as of August 23,
2017, by and between Morgan Stanley Bank, N.A., as Initial Note A-1 Holder and
Initial Note B-1 Holder, and Soci t G n rale, as Initial Note A-2 Holder and
Initial Note B-2 Holder (filed as Exhibit 4.7 to the registrant's Current
Report on Form 8-K filed on October 18, 2017 under Commission File No.

 4.9
 Agreement Between Note Holders, dated as of August 31,
2017, by and between UBS AG, by and through its branch office at 1285 Avenue of
the Americas, New York, New York, as Initial Note A-1 Holder, UBS AG, by and
through its branch office at 1285 Avenue of the Americas, New York, New York,
as Initial Note A-2 Holder, UBS AG, by and through its branch office at 1285
Avenue of the Americas, New York, New York, as Initial Note A-3 Holder, UBS AG,
by and through its branch office at 1285 Avenue of the Americas, New York, New
York, as Initial Note A-4 Holder, and UBS AG, by and through its branch office
at 1285 Avenue of the Americas, New York, New York, as Initial Note A-5 Holder
(filed as Exhibit 4.9 to the registrant's Current Report on Form 8-K filed on

 4.10 Co-Lender Agreement, dated as of May 30, 2017, by and
among JPMorgan Chase Bank, National Association, Natixis Real Estate Capital
LLC, Soci t G n rale, Deutsche Bank, AG, New York Branch, and Barclays Bank
PLC (filed as Exhibit 4.10 to the registrant's Current Report on Form 8-K filed
on October 18, 2017 under Commission File No. 333-207340-04 and incorporated by

 4.11 Amended and Restated Agreement Among Noteholders, dated
as of August 17, 2017, by and among UBS AG, by and through its branch office at
1285 Avenue of the Americas, New York, New York, as Initial Note A-1 Holder and
Initial Note A-2 Holder, and Townsend Real Estate Fund, L.P., as Junior
Noteholder (filed as Exhibit 4.11 to the registrant's Current Report on Form
8-K filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein).

 4.12 Co-Lender Agreement, dated as of October 18, 2017,
between Ladder Capital Finance LLC, as Note A-1 Holder, and Ladder Capital
Finance LLC, as Note A-2 Holder, and Ladder Capital Finance LLC, as Note A-3
Holder (filed as Exhibit 4.12 to the registrant's Current Report on Form 8-K
filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein).

 4.13 Agreement Between Note Holders, dated as of October 18,
2017, by and between UBS AG, by and through its branch office at 1285 Avenue of
the Americas, New York, New York, as Initial Note A-1 Holder, UBS AG, by and
through its branch office at 1285 Avenue of the Americas, New York, New York,
as Initial Note A-2 Holder, and UBS AG, by and through its branch office at
1285 Avenue of the Americas, New York, New York, as Initial Note A-3 Holder
(filed as Exhibit 4.13 to the registrant's Current Report on Form 8-K filed on

 4.14 Co-Lender Agreement, dated as of October 18, 2017, between
Ladder Capital Finance LLC, as Note A-1 Holder, and Ladder Capital Finance LLC,
as Note A-2 Holder (filed as Exhibit 4.14 to the registrant's Current Report on
Form 8-K filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein).

 4.15 Co-Lender Agreement, dated as of October 18, 2017,
between Ladder Capital Finance LLC, as Note A-1 Holder, and Ladder Capital
Finance LLC, as Note A-2 Holder (filed as Exhibit 4.15 to the registrant's
Current Report on Form 8-K filed on October 18, 2017 under Commission File No.

 4.16 Agreement Between Note Holders, dated as of October 18,
2017, by and between UBS AG, by and through its branch office at 1285 Avenue of
the Americas, New York, New York, as Initial Note A-1-1 Holder, Initial Note
A-1-2 Holder and Initial Note A-1-3 Holder, and Argentic Real Estate Finance
LLC, as Initial Note A-2 Holder (filed as Exhibit 4.16 to the registrant's
Current Report on Form 8-K filed on October 18, 2017 under Commission File No.

 4.17 Co-Lender Agreement, dated as of July 28, 2017, by and
between Natixis Real Estate Capital LLC, as Initial Note A-1 Holder, Natixis
Real Estate Capital LLC, as Initial Note A-2 Holder, Natixis Real Estate
Capital LLC, as Initial Note A-3 Holder, Natixis Real Estate Capital LLC, as
Initial Note B-1-A Holder, Natixis Real Estate Capital LLC, as Initial Note
B-1-B Holder, and Natixis Real Estate Capital LLC, as Initial Note B-2 Holder
(filed as Exhibit 4.17 to the registrant's Current Report on Form 8-K filed on

 4.18 Co-Lender Agreement, dated as of May 12, 2017, by and
among Bank of America, N.A., as Initial Note 1 Holder, and Barclays Bank PLC,
as Initial Note 2 Holder, and Soci t G n rale, as Initial Note 3 Holder, and
Wells Fargo Bank, National Association, as Initial Note 4 Holder (filed as
Exhibit 4.19 to the registrant's Current Report on Form 8-K filed on October 18,
2017 under Commission File No. 333-207340-04 and incorporated by reference
herein).

 Rule 13a-14(d)/15d-14(d) Certifications.

Reports on assessment of compliance with servicing criteria for asset-backed
securities.

 33.1
 Wells Fargo Bank, National Association, as Master
Servicer

 33.2

 33.3
 Situs Holdings, LLC, as Special Servicer of the
Fairmount at Brewerytown Mortgage Loan

 33.4
Wilmington Trust, National Association, as Trustee (Omitted. See Explanatory

 33.5
Certificate Administrator

 33.6
Custodian

 33.7
 Pentalpha Surveillance LLC, as Operating Advisor

 33.8
Participant

 33.9
as Servicing Function Participant for the Certificate Administrator

 33.10
as Servicing Function Participant for the Custodian

 33.11
Servicer of The District Mortgage Loan (see Exhibit 33.1)

 33.12
of The District Mortgage Loan (see Exhibit 33.2)

 33.13
Wilmington Trust, National Association, as Trustee of The District Mortgage
Loan (Omitted. See Explanatory Notes.)

 33.14
Custodian of The District Mortgage Loan (see Exhibit 33.6)

 33.15
The District Mortgage Loan (see Exhibit 33.7)

 33.16
Participant of The District Mortgage Loan (see Exhibit 33.8)

 33.17 Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian (see Exhibit 33.10)

 33.18
Servicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.1)

 33.19
of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.2)

 33.20
Wilmington Trust, National Association, as Trustee of the Meridian Sunrise
Village Mortgage Loan (Omitted. See Explanatory Notes.)

 33.21
Custodian of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.6)

 33.22
the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.7)

 33.23
Participant of the Meridian Sunrise Village Mortgage Loan (see Exhibit 33.8)

 33.24

 33.25
Servicer of the Bank of America Office Campus Building 600 Mortgage Loan (see
Exhibit 33.1)

 33.26
of the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit
33.2)

 33.27
Wilmington Trust, National Association, as Trustee of the Bank of America
Office Campus Building 600 Mortgage Loan (Omitted. See Explanatory Notes.)

 33.28
 Wells Fargo Bank, National Association, as Custodian
of the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit
33.6)

 33.29
the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit 33.7)

 33.30
Participant of the Bank of America Office Campus Building 600 Mortgage Loan
(see Exhibit 33.8)

 33.31

 33.32
Servicer of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.1)

 33.33
of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.2)

 33.34
Wilmington Trust, National Association, as Trustee of the DoubleTree Berkeley
Marina Mortgage Loan (Omitted. See Explanatory Notes.)

 33.35
Custodian of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.6)

 33.36
the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.7)

 33.37
Participant of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 33.8)

 33.38

 33.39
Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit 33.1)

 33.40
 Situs Holdings, LLC, as Special Servicer of the 245
Park Avenue Mortgage Loan (see Exhibit 33.3)

 33.41
Wilmington Trust, National Association, as Trustee of the 245 Park Avenue

 33.42
Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit 33.6)

 33.43
 BellOak, LLC, as Operating Advisor of the 245 Park
Avenue Mortgage Loan

 33.44
Participant of the 245 Park Avenue Mortgage Loan (see Exhibit 33.8)

 33.45

 33.46
KeyBank National Association, as Primary Servicer of the Del Amo Fashion Center

 33.47
 Situs Holdings, LLC, successor to Cohen Financial,
a Division of Truist Bank, successor by merger to SunTrust Bank, as Special
Servicer of the Del Amo Fashion Center Mortgage Loan (see Exhibit 33.3)

 33.48
Wilmington Trust, National Association, as Trustee of the Del Amo Fashion
Center Mortgage Loan (Omitted. See Explanatory Notes.)

 33.49
Custodian of the Del Amo Fashion Center Mortgage Loan (see Exhibit 33.6)

 33.50
Advisor of the Del Amo Fashion Center Mortgage Loan

 33.51

 33.52
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 33.1)

 33.53
 Wells Fargo Bank, National Association, as Special
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 33.1)

 33.54
Wilmington Trust, National Association, as Trustee of the 237 Park Avenue

 33.55
Custodian of the 237 Park Avenue Mortgage Loan (see Exhibit 33.6)

 33.56
Advisor of the 237 Park Avenue Mortgage Loan (see Exhibit 33.50)

 33.57
Participant of the 237 Park Avenue Mortgage Loan (see Exhibit 33.8)

 33.58

 33.59
KeyBank National Association, as Primary Servicer of the JW Marriott Chicago

 33.60
of the JW Marriott Chicago Mortgage Loan (see Exhibit 33.2)

 33.61
Wells Fargo Bank, National Association, as Trustee of the JW Marriott Chicago

 33.62
Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit 33.6)

 33.63
the JW Marriott Chicago Mortgage Loan (see Exhibit 33.7)

 33.64

 33.65
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer of the 50 Varick Street Mortgage Loan (Omitted. See Explanatory

 33.66
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer of the 50 Varick Street Mortgage Loan prior to May 5, 2023 (Omitted.
See Explanatory Notes.)

 33.67
K-Star Asset Management LLC, as Special Servicer of the 50 Varick Street
Mortgage Loan on and after May 5, 2023 (Omitted. See Explanatory Notes.)

 33.68
Wells Fargo Bank, National Association, as Trustee of the 50 Varick Street

 33.69
Custodian of the 50 Varick Street Mortgage Loan (see Exhibit 33.6)

 33.70
Advisor of the 50 Varick Street Mortgage Loan (see Exhibit 33.50)

 33.71

 33.72
Servicer of the Macedonia Commons Mortgage Loan (see Exhibit 33.1)

 33.73
Argentic Services Company LP, as Special Servicer of the Macedonia Commons

 33.74
Wilmington Trust, National Association, as Trustee of the Macedonia Commons

 33.75
Custodian of the Macedonia Commons Mortgage Loan (see Exhibit 33.6)

 33.76
 BellOak, LLC, as Operating Advisor of the
Macedonia Commons Mortgage Loan (see Exhibit 33.43)

 33.77
Participant of the Macedonia Commons Mortgage Loan (see Exhibit 33.8)

 33.78

 Attestation
reports on assessment of compliance with servicing criteria for asset-backed
securities.

 34.1
 Wells Fargo Bank, National Association, as Master
Servicer

 34.2

 34.3
 Situs Holdings, LLC, as Special Servicer of the
Fairmount at Brewerytown Mortgage Loan

 34.4
Wilmington Trust, National Association, as Trustee (Omitted. See Explanatory

 34.5
Certificate Administrator

 34.6
Custodian

 34.7
 Pentalpha Surveillance LLC, as Operating Advisor

 34.8
Participant

 34.9
as Servicing Function Participant for the Certificate Administrator

 34.10
as Servicing Function Participant for the Custodian

 34.11
Servicer of The District Mortgage Loan (see Exhibit 34.1)

 34.12
of The District Mortgage Loan (see Exhibit 34.2)

 34.13
Wilmington Trust, National Association, as Trustee of The District Mortgage Loan
(Omitted. See Explanatory Notes.)

 34.14
Custodian of The District Mortgage Loan (see Exhibit 34.6)

 34.15
The District Mortgage Loan (see Exhibit 34.7)

 34.16
Participant of The District Mortgage Loan (see Exhibit 34.8)

 34.17

 34.18
Servicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.1)

 34.19
of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.2)

 34.20
Wilmington Trust, National Association, as Trustee of the Meridian Sunrise Village

 34.21
Custodian of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.6)

 34.22
the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.7)

 34.23
Participant of the Meridian Sunrise Village Mortgage Loan (see Exhibit 34.8)

 34.24

 34.25
Servicer of the Bank of America Office Campus Building 600 Mortgage Loan (see
Exhibit 34.1)

 34.26
of the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit
34.2)

 34.27
Wilmington Trust, National Association, as Trustee of the Bank of America
Office Campus Building 600 Mortgage Loan (Omitted. See Explanatory Notes.)

 34.28
Custodian of the Bank of America Office Campus Building 600 Mortgage Loan (see
Exhibit 34.6)

 34.29
the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit 34.7)

 34.30
Participant of the Bank of America Office Campus Building 600 Mortgage Loan
(see Exhibit 34.8)

 34.31

 34.32
Servicer of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.1)

 34.33
of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.2)

 34.34
Wilmington Trust, National Association, as Trustee of the DoubleTree Berkeley
Marina Mortgage Loan (Omitted. See Explanatory Notes.)

 34.35
Custodian of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.6)

 34.36
the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.7)

 34.37
Participant of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 34.8)

 34.38

 34.39
Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit 34.1)

 34.40
 Situs Holdings, LLC, as Special Servicer of the 245
Park Avenue Mortgage Loan (see Exhibit 34.3)

 34.41
Wilmington Trust, National Association, as Trustee of the 245 Park Avenue

 34.42
Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit 34.6)

 34.43
 BellOak, LLC, as Operating Advisor of the 245 Park
Avenue Mortgage Loan

 34.44
Participant of the 245 Park Avenue Mortgage Loan (see Exhibit 34.8)

 34.45

 34.46
KeyBank National Association, as Primary Servicer of the Del Amo Fashion Center

 34.47
 Situs Holdings, LLC, successor to Cohen Financial,
a Division of Truist Bank, successor by merger to SunTrust Bank, as Special
Servicer of the Del Amo Fashion Center Mortgage Loan (see Exhibit 34.3)

 34.48
Wilmington Trust, National Association, as Trustee of the Del Amo Fashion
Center Mortgage Loan (Omitted. See Explanatory Notes.)

 34.49
Custodian of the Del Amo Fashion Center Mortgage Loan (see Exhibit 34.6)

 34.50
Advisor of the Del Amo Fashion Center Mortgage Loan

 34.51

 34.52
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 34.1)

 34.53
 Wells Fargo Bank, National Association, as Special
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 34.1)

 34.54
Wilmington Trust, National Association, as Trustee of the 237 Park Avenue

 34.55
Custodian of the 237 Park Avenue Mortgage Loan (see Exhibit 34.6)

 34.56
Advisor of the 237 Park Avenue Mortgage Loan (see Exhibit 34.50)

 34.57
Participant of the 237 Park Avenue Mortgage Loan (see Exhibit 34.8)

 34.58

 34.59
KeyBank National Association, as Primary Servicer of the JW Marriott Chicago

 34.60
of the JW Marriott Chicago Mortgage Loan (see Exhibit 34.2)

 34.61
Wells Fargo Bank, National Association, as Trustee of the JW Marriott Chicago

 34.62
Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit 34.6)

 34.63
the JW Marriott Chicago Mortgage Loan (see Exhibit 34.7)

 34.64

 34.65
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer of the 50 Varick Street Mortgage Loan (Omitted. See Explanatory

 34.66
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer of the 50 Varick Street Mortgage Loan prior to May 5, 2023 (Omitted.
See Explanatory Notes.)

 34.67
K-Star Asset Management LLC, as Special Servicer of the 50 Varick Street
Mortgage Loan on and after May 5, 2023 (Omitted. See Explanatory Notes.)

 34.68
Wells Fargo Bank, National Association, as Trustee of the 50 Varick Street

 34.69
Custodian of the 50 Varick Street Mortgage Loan (see Exhibit 34.6)

 34.70
Advisor of the 50 Varick Street Mortgage Loan (see Exhibit 34.50)

 34.71

 34.72
Servicer of the Macedonia Commons Mortgage Loan (see Exhibit 34.1)

 34.73
Argentic Services Company LP, as Special Servicer of the Macedonia Commons Mortgage
Loan (Omitted. See Explanatory Notes.)

 34.74
Wilmington Trust, National Association, as Trustee of the Macedonia Commons

 34.75
Custodian of the Macedonia Commons Mortgage Loan (see Exhibit 34.6)

 34.76
 BellOak, LLC, as Operating Advisor of the
Macedonia Commons Mortgage Loan (see Exhibit 34.43)

 34.77
Participant of the Macedonia Commons Mortgage Loan (see Exhibit 34.8)

 34.78

Servicer compliance statements.

 35.1
 Wells Fargo Bank, National Association, as Master
Servicer

 35.2

 35.3 Situs Holdings, LLC,
as Special Servicer of the Fairmount at Brewerytown Mortgage Loan (Omitted. See
Explanatory Notes.)

 35.4
Certificate Administrator

 35.5
as Servicing Function Participant for the Certificate Administrator

 35.6
Servicer of The District Mortgage Loan (see Exhibit 35.1)

 35.7
of The District Mortgage Loan (see Exhibit 35.2)

 35.8
Servicer of the Meridian Sunrise Village Mortgage Loan (see Exhibit 35.1)

 35.9
of the Meridian Sunrise Village Mortgage Loan (see Exhibit 35.2)

 35.10
Servicer of the Bank of America Office Campus Building 600 Mortgage Loan (see
Exhibit 35.1)

 35.11
of the Bank of America Office Campus Building 600 Mortgage Loan (see Exhibit
35.2)

 35.12
Servicer of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 35.1)

 35.13
of the DoubleTree Berkeley Marina Mortgage Loan (see Exhibit 35.2)

 35.14
Servicer of the 245 Park Avenue Mortgage Loan (see Exhibit 35.1)

 35.15
Situs Holdings, LLC, as Special Servicer of the 245 Park Avenue Mortgage Loan
(Omitted. See Explanatory Notes.)

 35.16
KeyBank National Association, as Primary Servicer of the Del Amo Fashion Center

 35.17
Situs Holdings, LLC, successor to Cohen Financial, a Division of Truist Bank,
successor by merger to SunTrust Bank, as Special Servicer of the Del Amo
Fashion Center Mortgage Loan (Omitted. See Explanatory Notes.)

 35.18
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 35.1)

 35.19
 Wells Fargo Bank, National Association, as Special
Servicer of the 237 Park Avenue Mortgage Loan (see Exhibit 35.1)

 35.20
KeyBank National Association, as Primary Servicer of the JW Marriott Chicago

 35.21
of the JW Marriott Chicago Mortgage Loan (see Exhibit 35.2)

 35.22
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer of the 50 Varick Street Mortgage Loan (Omitted. See Explanatory

 35.23
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer of the 50 Varick Street Mortgage Loan prior to May 5, 2023 (Omitted.
See Explanatory Notes.)

 35.24
K-Star Asset Management LLC, as Special Servicer of the 50 Varick Street
Mortgage Loan on and after May 5, 2023 (Omitted. See Explanatory Notes.)

 35.25
Servicer of the Macedonia Commons Mortgage Loan (see Exhibit 35.1)

 35.26
Argentic Services Company LP, as Special Servicer of the Macedonia Commons

 99.1 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between UBS AG, by and through its branch office at 1285 Avenue of
the Americas, New York, New York and UBS Commercial Mortgage Securitization
Corp. (filed as Exhibit 99.1 to the registrant's Current Report on Form 8-K
filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein)

 99.2 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between Soci t G n rale and UBS Commercial Mortgage Securitization
Corp. (filed as Exhibit 99.2 to the registrant's Current Report on Form 8-K
filed on October 18, 2017 under Commission File No. 333-207340-04 and
incorporated by reference herein)

 99.3 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between Ladder Capital Finance LLC, Ladder Capital Finance Holdings
LLLP, Series REIT of Ladder Capital Finance Holdings LLLP, Series TRS of Ladder
Capital Finance Holdings LLLP and UBS Commercial Mortgage Securitization Corp.
(filed as Exhibit 99.3 to the registrant's Current Report on Form 8-K filed on
reference herein)

 99.4 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between Rialto Mortgage Finance, LLC and UBS Commercial Mortgage
Securitization Corp. (filed as Exhibit 99.4 to the registrant's Current Report
on Form 8-K filed on October 18, 2017 under Commission File No. 333-207340-04
and incorporated by reference herein)

 99.5 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between CIBC Inc. and UBS Commercial Mortgage Securitization Corp.
(filed as Exhibit 99.5 to the registrant's Current Report on Form 8-K filed on
reference herein)

 99.6 Mortgage Loan Purchase Agreement, dated as of September
29, 2017, between Natixis Real Estate Capital LLC and UBS Commercial Mortgage
Securitization Corp. (filed as Exhibit 99.6 to the registrant's Current Report
on Form 8-K filed on October 18, 2017 under Commission File No. 333-207340-04
and incorporated by reference herein)

 (b)
The exhibits required to be filed by the Registrant pursuant to Item 601 of
Regulation S-K are listed above.

 (c)
Not Applicable.

 SIGNATURES

 Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this report to
be signed on its behalf by the undersigned, thereunto duly authorized.

 UBS Commercial Mortgage
Securitization Corp.

(Depositor)

 /s/
Nicholas Galeone

 Nicholas
Galeone, President

 (senior officer in charge of
securitization of the depositor)

 Date: March 14, 2024

 /s/ Andrew
Lisa

 Andrew Lisa, Director

 Date: March 14, 2024