UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, DC 20549
                             --------------------

                                   FORM 10-K
                                 ANNUAL REPORT
                       PURSUANT TO SECTIONS 13 OR 15(d)
                    OF THE SECURITIES EXCHANGE ACT OF 1934

(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, 2006
                                      -----------------

                                      or

[  ]  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 Issuing Entity: 333-131662-15
                                                      -------------

                   CHL Mortgage Pass-Through Trust 2006-15,
              Mortgage Pass-Through Certificates, Series 2006-15
              --------------------------------------------------
          (Exact name of Issuing Entity as Specified in Its Charter)

                Commission file number of Depositor: 333-131662

                                  CWMBS, Inc.
                                  -----------
             (Exact name of Depositor as Specified in Its Charter)

                         Countrywide Home Loans, Inc.
                         ----------------------------
              (Exact name of Sponsor as Specified in Its Charter)
<TABLE>
<S>                                                                        <C>
              Delaware                                                     95-4449516
------------------------------------                     ---------------------------------------------
(State or Other Jurisdiction of                              (I.R.S. Employer Identification No. of
Incorporation or Organization of                          the Depositor)
the Depositor)

c/o  Countrywide Home Loans Servicing LP
     4500 Park Granada
     Calabasas, California                                                   91302
-----------------------------------------------          ---------------------------------------------
(Address of Principal Executive Offices                                    (Zip Code)
of the Depositor)
</TABLE>

Registrant's telephone number, including area code:   (818) 225-3000
                                                      --------------

Securities registered pursuant to Section 12(b) of the Act:  None
                                                             ----

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



<PAGE>


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

          Indicate by check mark if disclosure of delinquent filers pursuant
to Item 405 of Regulation S-K (ss.229.405 of this chapter) is not contained
herein, and will not be contained, to the best of registrant's knowledge, in
definitive proxy or information statements incorporated by reference in Part
III of this Form 10-K or any amendment to this Form 10-K.              [X]

          Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer. See definition of
"accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange
Act. (Check one):

Large Accelerated Filer [  ]  Accelerated Filer [  ]   Non-Accelerated Filer [X]

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

          The Registrant has no voting or non-voting common equity held by
non-affiliates.


                                      2
<PAGE>


                      DOCUMENTS INCORPORATED BY REFERENCE

                                     None.

                               *       *       *


          This Annual Report on Form 10-K (the "Report") is filed with respect
to the trust entitled CHL Mortgage Pass-Through Trust 2006-15 (the "Issuing
Entity") formed pursuant to the pooling and servicing agreement dated as of
August 1, 2006 (the "Pooling and Servicing Agreement") among CWMBS, Inc., as
depositor (the "Company"), Countrywide Home Loans, Inc., as a seller (a
"Seller"), Park Granada LLC, as a seller (a "Seller"), Park Sienna LLC, as a
seller (a "Seller"), Park Monaco Inc., as a seller (a "Seller"), Countrywide
Home Loans Servicing LP, as master servicer (the "Master Servicer"), and The
Bank of New York, as trustee (the "Trustee"), for the issuance of Mortgage
Pass-Through Certificates, Series 2006-15 (the "Certificates").



                                      3
<PAGE>


                                    PART I


Item 1.    Business.

           Omitted as permitted by Instruction J to Form 10-K.

Item 1A.   Risk Factors.

           Omitted as permitted by Instruction J to Form 10-K.

Item 1B.   Unresolved Staff Comments.

           Not Applicable.

Item 2.    Properties.

           Omitted as permitted by Instruction J to Form 10-K.

Item 3.    Legal Proceedings.

           Omitted as permitted by Instruction J to Form 10-K.

Item 4.    Submission of Matters to a Vote of Security Holders.

           Omitted as permitted by Instruction J to Form 10-K.


                                      4
<PAGE>


                                    PART II


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

           Omitted as permitted by Instruction J to Form 10-K.

Item 6.    Selected Financial Data.

           Omitted as permitted by Instruction J to Form 10-K.

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

           Omitted as permitted by Instruction J to Form 10-K.

Item 7A    Quantitative and Qualitative Disclosures about Market Risk.

           Omitted as permitted by Instruction J to Form 10-K.

Item 8.    Financial Statements and Supplementary Data.

           Omitted as permitted by Instruction J to Form 10-K.

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

           Omitted as permitted by Instruction J to Form 10-K.

Item 9A.   Controls and Procedures.

           Omitted as permitted by Instruction J to Form 10-K.

Item 9B.   Other Information.

           None.


                                      5
<PAGE>


                                   PART III


Item 10.  Directors, Executive Officers and Corporate Governance.

          Omitted as permitted by Instruction J to Form 10-K.

Item 11.  Executive Compensation.

          Omitted as permitted by Instruction J to Form 10-K.

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

          Omitted as permitted by Instruction J to Form 10-K.

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

          Omitted as permitted by Instruction J to Form 10-K.

Item 14.  Principal Accountant Fees and Services.

          Omitted as permitted by Instruction J to Form 10-K.


                                      6
<PAGE>


                                    PART IV


Item 15.    Exhibits and Financial Statement Schedules.

            (a)   (1) Not applicable.

                  (2) Not applicable.

                  (3) The required exhibits are as follows:

                           o    Exhibit 3(i): Copy of Company's
                                Certificate of Incorporation (Filed
                                as Exhibit 3.1 to Registration
                                Statement on Form S-3 (File No.
                                33-63714))

                           o    Exhibit 3(ii): Copy of Company's
                                By-laws (Filed as Exhibit 3.2 to
                                Registration Statement on Form S-3
                                (File No. 33-63714))

                           o    Exhibit 4: Pooling and Servicing
                                Agreement (Filed as part of the
                                Current Report on Form 8-K filed on
                                September 14, 2006 under the
                                Commission file number of the Issuing
                                Entity)

                           o    Exhibit 31(ii):  Rule 15d-14(d) Certification

                           o    Exhibit 33.1:  Report on Assessment of
                                Compliance With Servicing Criteria for
                                Asset-Backed Securities for Countrywide
                                Financial Corporation

                           o    Exhibit 33.2: Report on Assessment of Compliance
                                With Servicing Criteria for Asset-Backed
                                Securities for the Trustee

                           o    Exhibit 34.1: Attestation Report on Assessment
                                of Compliance With Servicing Criteria for
                                Asset-Backed Securities of KPMG LLP on behalf of
                                Countrywide Financial Corporation

                           o    Exhibit 34.2:  Attestation Report on Assessment
                                of Compliance With Servicing Criteria for
                                Asset-Backed Securities of Ernst & Young LLP on
                                behalf of the Trustee

                           o    Exhibit 35:  Servicer Compliance Statement of
                                the Master Servicer

            (b)   See subparagraph (a)(3) above.

            (c)   Not applicable.


                                      7
<PAGE>


                            ADDITIONAL INFORMATION


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

             Not Applicable.


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

             Not Applicable.


Item 1115(b) of Regulation AB.      Financial Information of Certain Entities
                                    Providing Derivative Instruments.

             Not Applicable.


Item 1117 of Regulation AB.         Legal Proceedings.

             None.


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

             The information required by Item 1119 of Regulation AB was
             previously filed with the U.S. Securities and Exchange
             Commission in the prospectus supplement filed under Rule
             424(b) of the Securities Act of 1933, as amended, for CHL
             Mortgage Pass-Through Trust 2006-15.

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

             See Exhibits 33.1, 33.2, 34.1 and 34.2 to this Form 10-K.


Item 1123 of Regulation AB.         Servicer Compliance Statement.

             See Exhibit 35 to this Form 10-K.


                                      8

<PAGE>


                                  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.

                              CHL MORTGAGE PASS-THROUGH TRUST 2006-15

                              By:   Countrywide Home Loans Servicing LP,
                                    as Master Servicer

                                    By:   Countrywide GP, Inc.


                                          By:  /s/ Steve Bailey
                                               --------------------------
                                               Name:  Steve Bailey
                                               Title: Senior Managing Director,
                                                      Loan Administration

                                               Date:  March 26, 2007



                                      9
<PAGE>



          SUPPLEMENTAL INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT
TO SECTION 15(d) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED
SECURITIES PURSUANT TO SECTION 12 OF THE ACT.

          No annual report, proxy statement, form of proxy or other proxy
soliciting material with respect to the Issuing Entity or the Depositor has
been, or will be, sent to security holders.




                                      10
<PAGE>


                                 EXHIBIT INDEX


Exhibit    Document
-------    --------


3(i)       Company's Certificate of Incorporation (Filed as Exhibit 3.1 to
           Registration Statement on Form S-3 (File No. 33-63714))*

3(ii)      Company's By-laws (Filed as Exhibit 3.2 to Registration Statement on
           Form S-3 (File No. 33-63714)*

4          Pooling and Servicing Agreement (Filed as part of the Current Report
           on Form 8-K filed on September 14, 2006 under the Commission file
           number of the Issuing Entity)*

31(ii)     Rule 15d-14(d) Certification

33.1       Report on Assessment of Compliance With Servicing Criteria for
           Asset-Backed Securities for Countrywide Financial Corporation

33.2       Report on Assessment of Compliance With Servicing Criteria for
           Asset-Backed Securities for the Trustee

34.1       Attestation Report on Assessment of Compliance With Servicing
           Criteria for Asset-Backed Securities of KPMG LLP on behalf of
           Countrywide Financial Corporation

34.2       Attestation Report on Assessment of Compliance With Servicing
           Criteria for Asset-Backed Securities of Ernst & Young LLP on behalf
           of the Trustee

35         Servicer Compliance Statement of the Master Servicer



_____________________
*  Incorporated herein by reference.


                                      11