Improper access control in Microsoft Windows Defender Application Control

1) Improper access control

EUVDB-ID: #VU107263

Risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-26678

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Windows Defender Application Control. A local attacker can bypass Windows Defender Application Control (WDAC) enforcement.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 10 21H2 10.0.19041.3920 - 11 24H2 10.0.26100.3476

Windows Server: 2012 R2 6.3.9600.21871 - 2025 10.0.26100.3476

CPE2.3

• cpe:2.3:o:microsoft:windows:10_21H2:10.0.19044.5608:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_22H2:10.0.19045.5608:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.7876:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1809:10.0.17763.7009:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:11_22H2:10.0.22621.5039:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:11_23H2:10.0.22631.5039:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:11_24H2:10.0.26100.3476:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22470:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2019:10.0.17763.7009:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2022_23H2:10.0.25398.1486:*:*:*:*:*:*

External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26678

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.