What’s Vulnerable › Vulnerabilities

CVE-2026-33825: Microsoft Defender Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-04-22
• EPSS: 6.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-14 · updated 2026-10-15
• Weakness: CWE-1220

Description

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Defender Antimalware Platform: before 4.18.26030.3011 — fixed in 4.18.26030.3011
• Microsoft Defender Antimalware Platform: from 4.0.0.0 before 4.18.26030.3011 — fixed in 4.18.26030.3011

How to fix

Upgrade to a fixed version: Microsoft Defender Antimalware Platform 4.18.26030.3011; Microsoft Defender Antimalware Platform 4.18.26030.3011. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33825
• https://www.huntress.com/blog/nightmare-eclipse-intrusion

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