Rule13a-14(d)/15d-14(d) Certifications.

 

I,Helaine M. Kaplan, certify that:

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| 1.     | I have reviewed this report  on Form 10-K and all reports on Form 10-D required to be filed in respect of the  period covered by this report on Form 10-K of the COMM 2015-CCRE26 Mortgage  Trust (the "Exchange Act periodic reports");                                                                                                                                                                                                                                                                                                                              |
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| 2.     | Based on my knowledge, the  Exchange Act periodic reports, taken as a whole, do not contain any untrue statement  of a material fact or omit to state a material fact necessary to make the  statements made, in light of the circumstances under which such statements  were made, not misleading with respect to the period covered by this report;                                                                                                                                                                                                                           |
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| 3.     | Based on my knowledge, all  of the distribution, servicing and other information required to be provided  under Form 10-D for the period covered by this report is included in the  Exchange Act periodic reports;                                                                                                                                                                                                                                                                                                                                                              |
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| 4.     | Based on my knowledge and  the servicer compliance statements required in this report under Item 1123 of  Regulation AB, and except as disclosed in the Exchange Act periodic reports,  the servicers have fulfilled their obligations under the servicing agreements  in all material respects; and                                                                                                                                                                                                                                                                            |
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| 5.     | All of the reports on  assessment of compliance with servicing criteria for asset-backed securities  and their related attestation reports on assessment of compliance with servicing  criteria for asset-backed securities required to be included in this report  in accordance with Item 1122 of Regulation AB and Exchange Act Rules 13a-18  and 15d-18 have been included as an exhibit to this report, except as  otherwise disclosed in this report. Any material instances of noncompliance  described in such reports have been disclosed in this report on Form 10-K. |
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Ingiving the certifications above, I have reasonably relied on information providedto me by the following unaffiliated parties:Wells Fargo Bank, National Association, as Master Servicer, CWCapital AssetManagement LLC, as Special Servicer, Wilmington Trust, National Association, asTrustee, Wells Fargo Bank, National Association, as Certificate Administrator,Wells Fargo Bank, National Association, as Custodian, Park Bridge LenderServices LLC, as Operating Advisor, CoreLogic Commercial Real Estate Services,Inc., as Servicing Function Participant, National Tax Search, LLC, as ServicingFunction Participant, Berkeley Point Capital LLC, as Primary Servicer, WellsFargo Bank, National Association, as Primary Servicer for the HeartlandIndustrial Portfolio Mortgage Loan, LNR Partners, LLC, as Special Servicer forthe Heartland Industrial Portfolio Mortgage Loan, Wilmington Trust, NationalAssociation, as Trustee for the Heartland Industrial Portfolio Mortgage Loan,Pentalpha Surveillance LLC, as Operating Advisor for the Heartland IndustrialPortfolio Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., asServicing Function Participant for the Heartland Industrial Portfolio MortgageLoan, National Tax Search, LLC, as Servicing Function Participant for theHeartland Industrial Portfolio Mortgage Loan, KeyBank National Association, asPrimary Servicer for the 11 Madison Avenue Mortgage Loan, KeyBank NationalAssociation, as Special Servicer for the 11 Madison Avenue Mortgage Loan,Wilmington Trust, National Association, as Trustee for the 11 Madison AvenueMortgage Loan, Wells Fargo Bank, National Association, as CertificateAdministrator for the 11 Madison Avenue Mortgage Loan, and Wells Fargo Bank,National Association, as Custodian for the 11 Madison Avenue Mortgage Loan.

 

Dated: March 20, 2017

 

/s/Helaine M. Kaplan

President

(senior officer in charge ofsecuritization of the depositor)