Security Feature Bypass in Windows Defender Application Control by Microsoft
CVE-2025-26678

8.4HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
8 April 2025

What is CVE-2025-26678?

An improper access control flaw in Windows Defender Application Control permits unauthorized attackers to bypass essential security features locally, potentially compromising system integrity. This vulnerability highlights the need for diligent security measures to safeguard against unauthorized access and ensures that protective features remain intact.

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Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7136

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.5737

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.5737

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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