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AC-6(7) AC · Access Control

Review of User Privileges

LOW ✓ MODERATE ✓ HIGH
1 Overlay 1 Related Control
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Requirements NIST SOURCE

Discussion (NIST Supplemental Guidance)

The need for certain assigned user privileges may change over time to reflect changes in organizational mission and business functions, environments of operation, technologies, or threats. A periodic review of assigned user privileges is necessary to determine if the rationale for assigning such privileges remains valid. If the need cannot be revalidated, organizations take appropriate corrective actions.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for AC-6(7) yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. the frequency at which to review the privileges assigned to roles or classes of users is defined;
  2. roles or classes of users to which privileges are assigned are defined;
  3. privileges assigned to <AC-06(07)_ODP[02] roles and classes> are reviewed <AC-06(07)_ODP[01] frequency> to validate the need for such privileges;
  4. privileges are reassigned or removed, if necessary, to correctly reflect organizational mission and business needs.

Examine

[SELECT FROM: Access control policy; procedures addressing least privilege; list of system-generated roles or classes of users and assigned privileges; system design documentation; system configuration settings and associated documentation; validation reviews of privileges assigned to roles or classes or users; records of privilege removals or reassignments for roles or classes of users; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with responsibilities for reviewing least privileges necessary to accomplish specified tasks; organizational personnel with information security responsibilities; system/network administrators].

Test

[SELECT FROM: Mechanisms implementing review of user privileges].

Overlays

Showing the OT/ICS overlay for the parent control AC-6 — see the AC-6(7) entries within each baseline below.

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (5) (7) (9) (10)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (3) (5) (7) (9) (10)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-6(7). This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Access control policy
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Mechanisms implementing review of user privileges

Other Records

  • procedures addressing least privilege
  • list of system-generated roles or classes of users and assigned privileges
  • validation reviews of privileges assigned to roles or classes or users
  • records of privilege removals or reassignments for roles or classes of users
  • system audit records
  • other relevant documents or records