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

Windows Server 2025 Microsoft Defender antivirus SmartScreen must be enabled.

DISA Rule

SV-278108r1181818_rule

Vulnerability Number

V-278108

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

WN25-CC-000300

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 >> Windows Components >> File Explorer >> Configure Windows Defender SmartScreen to "Enabled" with either option "Warn" or "Warn and prevent bypass" selected.

Windows Server 2025 includes duplicate policies for this setting. It can also be configured under Computer Configuration >> Administrative Templates >> Windows Components >> Windows Defender SmartScreen >> Explorer.

Check Contents

This is applicable to unclassified systems; for other systems, this is not applicable.

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\Policies\Microsoft\Windows\System\

Value Name: EnableSmartScreen

Value Type: REG_DWORD
Value: 0x00000001 (1)

Vulnerability Number

V-278108

Documentable

False

Rule Version

WN25-CC-000300

Severity Override Guidance

This is applicable to unclassified systems; for other systems, this is not applicable.

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\Policies\Microsoft\Windows\System\

Value Name: EnableSmartScreen

Value Type: REG_DWORD
Value: 0x00000001 (1)

Check Content Reference

M

Target Key

5719