Microsoft Security Response CenterCVE-2026-113771

Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability

HighVendor CVSS 5.5 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC

Summary

Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Install KB5132059.

Nov 10, 2026 at 8:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Nov 10, 2026 at 8:15 PM UTC
Added to SecurityAlert
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Details collected from Microsoft Security Response Center.

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