Main Vulnerability Database Vulnerabilities #VU126208

Insufficient Granularity of Access Control in Windows Defender - CVE-2026-33825

Published: April 15, 2026 / Updated: April 23, 2026

Vulnerability identifier: #VU126208

CSH Severity: High

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-33825

CWE-ID: CWE-1220

Exploitation vector: Local access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to insufficient granularity of access control in Microsoft Defender. A local user can gain elevated privileges on the system.

Affected software

Windows Defender

How to mitigate CVE-2026-33825

Install updates from vendor's website.

Windows Defender - update to 4.18.26030.3011

Links to Public Exploits and PoC-codes

Exploit #12628 - SNEK Blue War Hammer - Vulnerability Documentation & Reimplementation - SNEK Blue War Hammer (April 23, 2026)

External References

Related Security Bulletins

Privilege escalation in Microsoft Defender