CVE-2025-26678

Windows Defender Application Control Security Feature Bypass Vulnerability

Description

Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attacker to bypass a security feature locally.

Link	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26678	vendor advisory

What is the severity of CVE-2025-26678?: CVE-2025-26678 has been scored as a high severity vulnerability.
How to fix CVE-2025-26678?: To fix CVE-2025-26678, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-26678 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-26678 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-26678?: CVE-2025-26678 affects Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows 10 Version 21H2, Microsoft Windows 11 version 22H2, Microsoft Windows 10 Version 22H2, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows 11 version 22H3, Microsoft Windows 11 Version 23H2, Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows 11 Version 24H2, Microsoft Windows Server 2025.