CVE-2026-62775

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

State: Published
Severity: 5.5 Medium
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Jul 14, 2026

Description

Incorrect authorization in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2704Affected

References

Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerabilityvendor-advisorypatch

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