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AC-2(13) AC · Access Control

Disable Accounts for High-risk Individuals

LOW ✓ MODERATE ✓ HIGH
1 Overlay 2 Related Controls
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Requirements NIST SOURCE

Disable accounts of individuals within [time period] of discovery of [significant risks].

Discussion (NIST Supplemental Guidance)

Users who pose a significant security and/or privacy risk include individuals for whom reliable evidence indicates either the intention to use authorized access to systems to cause harm or through whom adversaries will cause harm. Such harm includes adverse impacts to organizational operations, organizational assets, individuals, other organizations, or the Nation. Close coordination among system administrators, legal staff, human resource managers, and authorizing officials is essential when disabling system accounts for high-risk individuals.

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-2(13) 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. time period within which to disable accounts of individuals who are discovered to pose significant risk is defined;
  2. significant risks leading to disabling accounts are defined;
  3. accounts of individuals are disabled within <AC-02(13)_ODP[01] time period> of discovery of <AC-02(13)_ODP[02] significant risks>.

Examine

[SELECT FROM: Access control policy; procedures addressing account management; system design documentation; system configuration settings and associated documentation; system-generated list of disabled accounts; list of user activities posing significant organizational risk; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with account management responsibilities; system/network administrators; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms implementing account management functions].

Overlays

Showing the OT/ICS overlay for the parent control AC-2 — see the AC-2(13) 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

  • Base control: Included (matches standard baseline)

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (3) (4) (5) (13)
  • Added: (11) (12)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1) (2) (3) (4) (5) (13)
  • Excluded: (11) (12)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-2(13). 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 account management functions

Other Records

  • procedures addressing account management
  • system-generated list of disabled accounts
  • list of user activities posing significant organizational risk
  • system audit records
  • other relevant documents or records