Microsoft Defender Insufficient Granularity of Access Control Vulnerability

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• NewsExploited · CISA KEVKnown ransomware useMicrosoft · Defender

  Microsoft Defender Insufficient Granularity of Access Control Vulnerability

  CVE-2026-33825

  Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.

  CISA's required action · due 6 May 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: msrc.microsoft.com · nvd.nist.gov

  Added to KEV 22 Apr 2026 · Source checked 4 Nov 2026, 16:35 UTC · CISA KEV entry

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