STIGQter: STIG Summary: Microsoft Windows 11 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

PKU2U authentication using online identities must be prevented.

DISA Rule

SV-253459r991589_rule

Vulnerability Number

V-253459

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

WN11-SO-000185

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Allow PKU2U authentication requests to this computer to use online identities" to "Disabled".

Check Contents

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: \SYSTEM\CurrentControlSet\Control\LSA\pku2u\

Value Name: AllowOnlineID

Value Type: REG_DWORD
Value: 0

Vulnerability Number

V-253459

Documentable

False

Rule Version

WN11-SO-000185

Severity Override Guidance

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: \SYSTEM\CurrentControlSet\Control\LSA\pku2u\

Value Name: AllowOnlineID

Value Type: REG_DWORD
Value: 0

Check Content Reference

M

Target Key

5471