Windows Hyper-V Elevation of Privilege Vulnerability

CriticalVendor CVSS 9.3 / 10 1 CVE Published May 12, 2026 at 7:00 AM UTC

Summary

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

Install KB5087545. Install KB5087424. Install KB5087420. Install KB5093998.

May 12, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 27, 2026 at 11:11 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Nov 7, 2026 at 7:05 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

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