HIGH 7.1 Microsoft

CVE-2026-50428

Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability

Microsoft Security Update 2026-Jul: Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability

Affected Products

Windows 11 version 26H1 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50428
https://nvd.nist.gov/vuln/detail/CVE-2026-50428

Published: 2026-07-14 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 7.1 was published on 2026-07-14 via Microsoft. Affected: Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems.

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