VulnerabilityALERT High

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

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

Impact

CISA lists CVE-2026-33825 as known exploited in the wild for Microsoft Defender. Ransomware campaign use: Unknown. Federal remediation due date: 2026-05-06.

Recommended 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.

Published: 4/22/2026, 12:00:00 AMSource: CISA Known Exploited Vulnerabilities CatalogTags: CVE-2026-33825, Microsoft, Defender, CISA KEV, CWE-1220