What’s Vulnerable › Vulnerabilities

CVE-2026-69414: Microsoft Defender Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-14 · updated 2026-10-30
• Weakness: CWE-59

Description

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".

Affected products

• Microsoft Malware Protection Engine: all versions
• Microsoft Malware Protection Engine: from 1.1.0.0 before 1.1.26080.3 — fixed in 1.1.26080.3

How to fix

Upgrade to a fixed version: Microsoft Malware Protection Engine 1.1.26080.3. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414
• https://github.com/MSNightmare/ShieldBreak

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