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

The Server Message Block (SMB) v1 protocol must be disabled on the SMB client.

DISA Rule

SV-253288r958478_rule

Vulnerability Number

V-253288

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

WN11-00-000170

Severity

CAT II

CCI(s)

• CCI-000381 - Configure the system to provide only organization-defined mission essential capabilities.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "Configure SMBv1 client driver" to "Enabled" with "Disable driver (recommended)" selected for "Configure MrxSmb10 driver".

This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and "SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories, respectively.

The system must be restarted for the changes to take effect.

Check Contents

Different methods are available to disable SMBv1 on Windows 11, if WN11-00-000160is configured, this is NA.

If the following registry value is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\mrxsmb10\

Value Name: Start

Type: REG_DWORD
Value: 0x00000004 (4)

Vulnerability Number

V-253288

Documentable

False

Rule Version

WN11-00-000170

Severity Override Guidance

Different methods are available to disable SMBv1 on Windows 11, if WN11-00-000160is configured, this is NA.

If the following registry value is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\mrxsmb10\

Value Name: Start

Type: REG_DWORD
Value: 0x00000004 (4)

Check Content Reference

M

Target Key

5471