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TDA-16.4: Software Escrow

TDA 7 — High Protect

Mechanisms exist to escrow source code and supporting documentation to ensure software availability in the event the software provider goes out of business or is unable to provide support.

Renumbered: Formerly TDA-20.3 in SCF 2025.4.

Control Question: Does the organization escrow source code and supporting documentation to ensure software availability in the event the software provider goes out of business or is unable to provide support?

General (1)
Framework Mapping Values
NIST 800-218 PS.3.1
US (2)
Framework Mapping Values
USA Federal DHS CISA SSDAF 3
USA Federal EO 14028 4e(vi)
EMEA (1)
Framework Mapping Values
EMEA Saudi Arabia CSCC-1 2019 1-3-2-2
APAC (4)

Capability Maturity Model

Level 0 — Not Performed

Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.

Level 1 — Performed Informally

Technology Development & Acquisition (TDA) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with TDA domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Technology development & acquisition-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ Secure development practices loosely conform to industry-recognized standards for secure engineering (e.g., OWASP, NIST SP 800-218 and NIST SP 800-160).

Level 2 — Planned & Tracked

SCR-CMM Level 2 criteria definitions are not available for this control: ▪ A reasonable person would conclude a well-defined and standardized process is required. ▪ At this level of maturity, the “requirements-driven” nature of performing the control is focused on a localized and/or regionalized implementation, not uniform and consistent across the organization. ▪ Requirements are narrowly scoped for applicability and are primarily derived from compliance obligations (e.g., laws, regulations and contracts).

Level 3 — Well Defined

Technology Development & Acquisition (TDA) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with TDA domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with TDA domain capabilities are well-documented and kept current by process owners. ▪ A software development team, or similar function, is appropriately staffed and supported to implement and maintain TDA domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of technology development and acquisition management (e.g., project management software, software escrow solution and software testing tools). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with TDA domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls). ▪ An implemented and operational capability exists to escrow source code and supporting documentation to ensure software availability in the event the software provider goes out of business or is unable to provide support.

Level 4 — Quantitatively Controlled

Utilize SCR-CMM Level 3 criteria definitions: ▪ There are no defined Level 4 criteria, since it is reasonable to assume a quantitatively-controlled process is not necessary to operationalize this control. ▪ While it may be possible to develop “metrics-driven” capabilities for this control, the criteria would be organization-specific to define.

Level 5 — Continuously Improving

Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.

Assessment Objectives

  1. TDA-16.4_A01 source code and supporting documentation are escrowed to ensure software availability in the event the software provider goes out of business or is unable to provide support.

Evidence Requirements

E-TDA-13 Software Escrow

Documented evidence of a software escrow solution.

Technology Design & Acquisition

Technology Recommendations

Micro/Small

  • Source code escrow

Small

  • Source code escrow

Medium

  • Source code escrow

Large

  • Source code escrow

Enterprise

  • Source code escrow

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