CVE-2026-97790
mediumImproper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to p…
Vendor / product: Microsoft — windows 11 24h2
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
5.5
5.5 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:22
Modified: 2026-10-16 10:40
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:00 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / windows_11_24h2 <10.0.26100.9711
microsoft / windows_11_25h2 <10.0.26200.9711
microsoft / windows_11_26h1 <10.0.28000.3231
microsoft / windows_11_26h2 <10.0.26300.9711
microsoft / windows_server_2022 <10.0.20348.5761
microsoft / windows_server_2025 <10.0.26100.33650
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97790
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97790
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97790 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:00 UTC · record ↗