STIGQter STIGQter: STIG Summary: Microsoft Windows Server 2025 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

The Windows Server 2025 built-in guest account must be renamed.

DISA Rule

SV-278198r1182317_rule

Vulnerability Number

V-278198

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

WN25-SO-000040

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Accounts: Rename guest account to a name other than "Guest".

Check Contents

This applies to member servers and stand-alone or nondomain-joined systems; it is not applicable for domain controllers.

Verify the effective setting in Local Group Policy Editor.

Run "gpedit.msc".

Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options.

If the value for "Accounts: Rename guest account" is not set to a value other than "Guest", this is a finding.

For server core installations, run the following command:

Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt

If "NewGuestName" is not something other than "Guest" in the file, this is a finding.

Vulnerability Number

V-278198

Documentable

False

Rule Version

WN25-SO-000040

Severity Override Guidance

This applies to member servers and stand-alone or nondomain-joined systems; it is not applicable for domain controllers.

Verify the effective setting in Local Group Policy Editor.

Run "gpedit.msc".

Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options.

If the value for "Accounts: Rename guest account" is not set to a value other than "Guest", this is a finding.

For server core installations, run the following command:

Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt

If "NewGuestName" is not something other than "Guest" in the file, this is a finding.

Check Content Reference

M

Target Key

5719