All vulnerabilities
CVE-2026-33825

Microsoft Defender Insufficient Granularity of Access Control Vulnerability

Microsoft Defender
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 22 Apr 2026. Known ransomware useCISA KEV
Exploit odds (EPSS)0.40%Chance of exploitation activity in the next 30 days, higher than 33% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.18.26030.3011Fixed versionCVE List
Federal deadline6 May 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

  • 4.18.26030.3011Microsoft Defender Antimalware PlatformCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 14 Apr 2026, 16:57 UTCPublishedCVE List
  2. 22 Apr 2026Added to CISA KEVCISA KEV

Description

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

Text from CVE List

Affected versions 1

  • Microsoft Defender Antimalware Platformaffected: 4.0.0.0 before 4.18.26030.3011CVE List

References 4