**SECURITIES AND EXCHANGE COMMISSION****Washington, D.C.  20549****UNITED STATES****FORM 10-K****[ X ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934****[    ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**(State or Other Jurisdiction(Telephone number, including area code)**CSMC Asset-Backed Trust 2007-NC1 OSI****Delaware**(I.R.S. Employer Identification No.)**13-3320910**(Commission file number of Issuing Entity) (Address of Principal Executive Offices)**New York, New York****11 Madison Avenue**(Zip Code)**10010****(212)-325-2000**Securities registered pursuant to Section 12(b) 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.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. For the fiscal year ended December 31, 2007orFor the transition period from _____________ to _____________(Exact name of Issuing Entity)Securities registered pursuant to Section 12(g) of the Act:**None.**Indicate by check mark  if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.Indicate by check mark  if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K ( 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.                      Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer", "accelerated filer", and "smaller reporting company" in Rule 12b-2 of the Exchange Act.Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).**[ Yes]**Documents incorporated by reference: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.**Not Applicable.****[X No]****[ Yes] [X No]****[X Yes] [ No]****[X]****[  Yes] [X No]****Large accelerated filer [ ]****Accelerated filer [ ]****Non-accelerated filer [X]**(Exact Name of Registrant as Specified in its Charter)(Exact Name of Sponsor as Specified in its Charter)**Credit Suisse First Boston Mortgage Securities Corp. (Depositor)****DLJ MORTGAGE CAPITAL, INC.****333-140945-06**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.**Not Applicable.**Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of the last practicable date.**Not Applicable.**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).**Certain information is incorporated by reference below under Additional Disclosure Items Pursuant to General Instruction J.****Smaller reporting company [ ]****PART I****Item 1. Business.****Item 1A. Risk Factors.****Item 1B. Unresolved Staff Comments.****Item 2. Properties.****Item 3. Legal Proceedings.****Item 4. Submission of Matters to a Vote of Security Holders.**Omitted.Omitted.Omitted.Omitted.Omitted.None.**Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.****Item 6. Selected Financial Data.****Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation.****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.****PART II**Omitted.Omitted.Omitted.Omitted.Omitted.Omitted.Omitted.No disclosure is required to be provided.**Item 9B. Other Information.****Item 10. Directors and 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 Accounting Fees and Services.****PART III**Omitted.Omitted.Omitted.Omitted.Omitted.**Item 1112(b) of Regulation AB.****Item 1117 of Regulation AB.****Item 1119 of Regulation AB.****Item 1122 of Regulation AB.****Servicer Compliance Statement.****Significant Obligors of Pool Assets (Financial Information).****Legal Proceedings.****Affiliations and Certain Relationships and Related Transactions.****Compliance with Applicable Servicing Criteria****Item 1123 of Regulation AB.**The registrant knows of no material pending legal proceedings involving the entities contemplated by Item 1117 of Regulation AB, other than routine litigation incidental to the duties of those respective parties.No single obligor represents 10% or more of the pool assets held by the issuing entity.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.Credit Suisse International provides a Swap Agreement for the trust as disclosed in the 424 Prospectus.  No additional disclosure is necessary because the significance percentage for the Swap Agreement is less than 10%.**Item 1115(b) of Regulation AB.**The information regarding this Item has been previously filed in (i) a 424(b)(5) filing with the Securities and Exchange Commission on September 4, 2007 as Commission File No. 333-140945-06, Film No. 071095857, CIK No. 0001406554 and (ii) a 424(b)(5) filing with the Securities and Exchange Commission on November 21, 2007 as Commission File No. 333-140945-06, Film No. 071262240, CIK No. 0001406554.Deutsche Bank Trust Company Americas is now an affiliate of MortgageIT since the purchase of MortgageIT holdings, Inc. ("MortgageIT Holdings"), MortgageIT's former parent company, by an affiliate of DB Structured Products, Inc.Deutsche Bank Trust Company Americas is now an Affiliate of Chapel Funding, LLC ("Chapel Funding") since the purchase of Chapel Funding by an affiliate of DB Structured Products, Inc.The reports on assessment of compliance with the servicing criteria for asset-backed securities and the related attestation reports on such assessments of compliance are attached hereto under Item 15.a) American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc."), as Vendor American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc.") (collectively, the "Asserting Party") has assessed its compliance with the Applicable Servicing Criteria for the Reporting Period and has identified a material instance of noncompliance with the Applicable Servicing Criteria.  Specifically, the Asserting Party did not have, during the Reporting Period, sufficient policies and procedures to capture the information with respect t o the Platform Transactions necessary to determine compliance with 1122(d)(4)(xii). b) Deutsche Bank National Trust Company, as Custodianc) First American Real Estate Solutions of Texas, L.P., as Vendord) Ocwen Loan Servicing, LLC, as Servicere) Regulus Group LLC, as Vendorf) Select Portfolio Servicing, Inc., as Servicerg) U.S. Bank National Association, as Trustee**Item 1114(b)(2) of Regulation AB.****Credit Enhancement and Other Support, Except for Certain Derivatives Instruments (Information Regarding Significant Enhancement Providers Financial Information).**The servicer compliance statements are attached hereto under Item 15.**Certain Derivatives Instruments (Financial Information).****SUBSTITUTE INFORMATION  PROVIDED IN ACCORDANCE WITH GENERAL INSTRUCTION J(2) TO FORM 10-K.**a) Ocwen Loan Servicing, LLC, as Servicerb) Select Portfolio Servicing, Inc., as Servicerb) Not applicable.**Item 15. Exhibits, Financial Statement Schedules.**c) Omitted.**PART IV**a) ExhibitsThe Series Supplement, dated as of August 1, 2007 to the Standard Terms of Pooling and Servicing Agreement, dated as of August 1, 2007 by and among Credit Suisse First Boston Mortgage Securities Corp., as Depositor, DLJ Mortgage Capital, Inc., as Seller, Ocwen Loan Servicing, LLC, as Servicer, Select Portfolio Servicing, Inc., as Servicer and U.S. Bank National Association, as Trustee (incorporated herein by reference from Exhibit 4.1 of the Current Report on Form 8-K of the issuing entity, as filed with the Securities and Exchange Commission on September 20, 2007 as File No. 333-140945-06, Film No. 071126766, CIK No. 0001406554) and the Amended and Restated Series Supplement, dated as of November 21, 2007 to the Standard Terms of Pooling and Servicing Agreement, dated as of August 1, 2007 by and among Credit Suisse First Boston Mortgage Securities Corp., as Depositor, DLJ Mortgage Capital, Inc., as Seller, Ocwen Loan Servicing, LLC, as Servicer, Select Portfolio Servicing, Inc., as Servicer and U.S. Bank National Association, as Trustee (incorporated herein by reference from Exhibit 4.1 of the Current Report on Form 8-K of the issuing entity, as filed with the Securities and Exchange Commission on November 28, 2007 as File No. 333-140945-06, Film No. 071272380, CIK No. 0001406554).Incorporated by reference as Exhibit (4.1).  Exhibit 4.1Exhibit 10.1   Exhibit 33       Reports on assessment of compliance with servicing criteria for asset-backed securities.   Exhibit 34       Attestation reports on assessment of compliance with servicing criteria for asset-backed securities.    Exhibit 35       Servicer compliance statements.   Exhibit 31       Rule 13a-14(d)/15d-14(d) Certifications.a) American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc."), as Vendorb) Deutsche Bank National Trust Company, as Custodianc) First American Real Estate Solutions of Texas, L.P., as Vendord) Ocwen Loan Servicing, LLC, as Servicere) Regulus Group LLC, as Vendorf) Select Portfolio Servicing, Inc., as Servicerg) U.S. Bank National Association, as Trusteea) American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc."), as Vendorb) Deutsche Bank National Trust Company, as Custodianc) First American Real Estate Solutions of Texas, L.P., as Vendord) Ocwen Loan Servicing, LLC, as Servicere) Regulus Group LLC, as Vendorf) Select Portfolio Servicing, Inc., as Servicerg) U.S. Bank National Association, as Trusteea) Ocwen Loan Servicing, LLC, as Servicerb) Select Portfolio Servicing, Inc., as Servicer**SIGNATURES****March 28, 2008****/s/ Bruce Kaiserman****Bruce KaisermanVice President**Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.(Registrant) :**Credit Suisse First Boston Mortgage Securities Corp.****(Senior Officer in Charge of Securitization of the Depositor)****Title:**By (Signature and Title):**Name:**Date**EXHIBIT INDEX**EXHIBIT DESCRIPTION      Exhibit 33       Reports on assessment of compliance with servicing criteria for asset-backed securities.      Exhibit 34       Attestation reports on assessment of compliance with servicing criteria for asset-backed securities.       Exhibit 35       Servicer compliance statement.      Exhibit 31       Rule 13a-14(d)/15d-14(d) Certifications.a) American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc."), as Vendorb) Deutsche Bank National Trust Company, as Custodianc) First American Real Estate Solutions of Texas, L.P., as Vendord) Ocwen Loan Servicing, LLC, as Servicere) Regulus Group LLC, as Vendorf) Select Portfolio Servicing, Inc., as Servicerg) U.S. Bank National Association, as Trusteea) American Security Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc."), as Vendorb) Deutsche Bank National Trust Company, as Custodianc) First American Real Estate Solutions of Texas, L.P., as Vendord) Ocwen Loan Servicing, LLC, as Servicere) Regulus Group LLC, as Vendorf) Select Portfolio Servicing, Inc., as Servicerg) U.S. Bank National Association, as Trusteea) Ocwen Loan Servicing, LLC, as Servicerb) Select Portfolio Servicing, Inc., as Servicer