CVE-2026-33825: Microsoft Defender Insufficient Granularity of Access Control Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 22 Apr 2026. Vendor: Microsoft. Product: Defender.

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

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due 06 May 2026)