SV-253433r958504: The built-in guest account must be disabled. | Microsoft Windows 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

The built-in guest account must be disabled.

Description

Discussion Text

A system faces an increased vulnerability threat if the built-in guest account is not disabled. This account is a known account that exists on all Windows systems and cannot be deleted. This account is initialized during the installation of the operating system with no password assigned.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000804

References

DPMS Target Microsoft Windows 11 DISA DPMS Target Microsoft Windows 11 5471

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_windows_11 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows11:def:253433
$guestAccountStatus = (Get-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Services\LanMan Server\Parameters' -Name 'GuestAccount' -ErrorAction SilentlyContinue).GuestAccount -eq $false
if ($guestAccountStatus) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Guest account status" to "Disabled".