EUVD-2026-31101
GHSA-h776-j9jw-992p
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Defender (Malware Protection Engine) enables an authenticated low-privileged attacker to elevate to SYSTEM by abusing improper link resolution (CWE-59) before file access. The flaw scores CVSS 7.8 with high impact to confidentiality, integrity, and availability, and no public exploit is identified at time of analysis. …
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RemediationAI
24 hours: Identify all Windows systems running Microsoft Defender and confirm patch delivery capability via Windows Update, WSUS, or endpoint management tools. 7 days: Deploy vendor-released patch to production Windows systems, prioritizing critical infrastructure and high-value endpoints. …
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External POC / Exploit Code
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