Microsoft Defender Antimalware Platform vulnerabilities

2 known vulnerabilities in Microsoft Defender Antimalware Platform from Microsoft. 2 are rated high or critical, and 2 have been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 7.5 High severity

  Microsoft Defender Denial of Service Exploited

  CVE-2026-45498May 20, 2026MicrosoftEPSS 63.1%

  Microsoft Defender Denial of Service Vulnerability

• 7.8 High severity

  Microsoft Defender Insufficient Granularity of Access Control Exploited

  CVE-2026-33825Apr 14, 2026MicrosoftEPSS 6.87%

  Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.