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AC-02(12) Account Monitoring for Atypical Usage

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged AC High baseline part of AC-2

Title

Account Monitoring for Atypical Usage

Control

(a) Monitor system accounts for [Assignment: atypical usage] ; and
(b) Report atypical usage of system accounts to [Assignment: personnel or roles].

Discussion

Atypical usage includes accessing systems at certain times of the day or from locations that are not consistent with the normal usage patterns of individuals. Monitoring for atypical usage may reveal rogue behavior by individuals or an attack in progress. Account monitoring may inadvertently create privacy risks since data collected to identify atypical usage may reveal previously unknown information about the behavior of individuals. Organizations assess and document privacy risks from monitoring accounts for atypical usage in their privacy impact assessment and make determinations that are in alignment with their privacy program plan.

Parameters

ac-02.12_odp.01: atypical usage
ac-02.12_odp.02: personnel or roles

Related controls

au-6, au-7, ca-7, ir-8, si-4

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).