Name: Microsoft Windows: CVE-2026-97790: Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability
Creator: Rapid7
Published: 2026-10-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-97790, CWE-59, CVSS 5.5, EPSS 0.00372

Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.

CVSS Details

CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Microsoft Windows	—	2026-10 Cumulative Update for Microsoft Windows 11, version 24H2 (KB5127648)2026-10 Cumulative Update for Microsoft Windows Server 2022, version 21H2 (KB5126655)2026-10 Cumulative Update for Microsoft Windows Server 2025, version 24H2 (KB5126646)2026-10 Cumulative Update for Microsoft Windows 11, version 25H2 (KB5127648)2026-10 Cumulative Update for Microsoft Windows 11, version 26H1 (KB5127646)2026-10 Cumulative Update for Microsoft Windows Server 2022, version 22H2 (KB5126655)	Oct 13, 2026	Oct 13, 2026

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CVSS Details

Covered by Rapid7

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