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WN25-SO-000120 Windows Server 2025 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to AC-11, AC-11(1) via CCI-000056, CCI-000057, CCI-000060

Title

Windows Server 2025 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.

Control

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: InactivityTimeoutSecs Value Type: REG_DWORD Value: 0x00000384 (900) (or less, excluding "0" which is effectively disabled)

Discussion

Unattended systems are susceptible to unauthorized use and must be locked when unattended. The screen saver must be set at a maximum of 15 minutes and be password protected. This protects critical and sensitive data from exposure to unauthorized personnel with physical access to the computer. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012

Related controls

CCI-000056, CCI-000057, CCI-000060

Fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Interactive logon: Machine inactivity limit to "900" seconds or less, excluding "0", which is effectively disabled.