IAC-08.3: User & Service Account Inventories
Mechanisms exist to maintain a current list of authorized users and service accounts.
Renumbered: Formerly IAC-01.3 in SCF 2025.4.
Control Question: Does the organization maintain a current list of authorized users and service accounts?
General (1)
| Framework | Mapping Values |
|---|---|
| CSA CCM 4.1.0 | IAM-03 |
US (3)
| Framework | Mapping Values |
|---|---|
| USA Federal DoW BaTB IT 2026 | 2 |
| USA Federal DoD Zero Trust Execution Roadmap v1.1 | 1.1 |
| USA Federal NERC CIP 2024 | CIP-007-6 5.2 |
EMEA (6)
| Framework | Mapping Values |
|---|---|
| EMEA Germany C5 2026 | AM-02.05B IAM-01.03B IAM-06.02AC PSS-08.04B |
| EMEA EU NIS2 Annex 2024 | 11.2.2(e) |
| EMEA UK DEFSTAN 05-138 2024 | 2217 |
| EMEA UK DEFSTAN 05-138 - L1 2024 | 2217 |
| EMEA UK DEFSTAN 05-138 - L2 2024 | 2217 |
| EMEA UK DEFSTAN 05-138 - L3 2024 | 2217 |
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
Identification & Authentication (IAC) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with IAC domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Identity & Access Management (IAM)-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ IAM controls are primarily administrative in nature (e.g., policies & standards) to manage accounts and permissions. ▪ IT and/or cybersecurity personnel identify and implement IAM cybersecurity and data protection controls that are appropriate to address applicable statutory, regulatory and contractual requirements. ▪ Active Directory (AD), or a similar technologies, are used to centrally manage identities and permissions, but asset/process owners are authorized to operate a decentralized access control program for their specific Technology Assets, Applications, Services and/or Data (TAASD).
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
Identification & Authentication (IAC) 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 IAC 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 IAC domain capabilities are well-documented and kept current by process owners. ▪ An Identity & Access Management (IAM) team, or similar function, is appropriately staffed and supported to implement and maintain IAC domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of IAM operations (e.g., directory services, Authenticate, Authorize and Audit (AAA) solution). ▪ 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 IAC 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 maintain a current list of authorized users and service accounts.
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
- IAC-08.3_A01 a current list of authorized users and service accounts is maintained.
Evidence Requirements
- E-IAC-04 User & Service Inventory
-
Documented evidence of an inventory of authorized users and services.
Identity & Access Management - E-IAC-10 Active Accounts
-
Documented evidence of active system accounts and the name of the individual associated with each account.
Identity & Access Management - E-IAC-11 Recently Disabled Accounts
-
Documented evidence of list of recently disabled system accounts along with the name of the individual associated with each account.
Identity & Access Management
Technology Recommendations
Micro/Small
- Microsoft Active Directory (https://microsoft.com)
- Microsoft Entra (https://microsoft.com)
- AWS IAM (https://aws.amazon.com)
Small
- Microsoft Active Directory (https://microsoft.com)
- Microsoft Entra (https://microsoft.com)
- AWS IAM (https://aws.amazon.com)
Medium
- Microsoft Active Directory (https://microsoft.com)
- Microsoft Entra (https://microsoft.com)
- AWS IAM (https://aws.amazon.com)
Large
- Microsoft Active Directory (https://microsoft.com)
- Microsoft Entra (https://microsoft.com)
- AWS IAM (https://aws.amazon.com)
Enterprise
- Microsoft Active Directory (https://microsoft.com)
- Microsoft Entra (https://microsoft.com)
- AWS IAM (https://aws.amazon.com)