What is CVE-2026-97790?

CVE-2026-97790 is a medium-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Improper Link Resolution Before File Access. CVSS score: 5.5/10. Published 2026-10-13.

How severe is CVE-2026-97790?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Microsoft Windows 11 Version 24h2

CVE-2026-97790

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.

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-97790?: CVE-2026-97790 is a medium-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Improper Link Resolution Before File Access. CVSS score: 5.5/10. Published 2026-10-13.
How severe is CVE-2026-97790?: Medium severity. CVSS v3 base score is 5.5 out of 10.