Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since April 22, 2026.
CVE-2026-33825
Microsoft Defender Insufficient Granularity of Access Control Vulnerability
Added to KEV April 22, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-33825
- CWE
- CWE-1220
- Affected products
- Defender · Microsoft Defender · Microsoft
What happened
Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.
What it means for your business
Microsoft Defender is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-33825). Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally. CISA remediation due date: 2026-05-06. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: May 6, 2026
Sources
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