CVE-2026-97792

7.8High

Published 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash

7.8High

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-732

Impact

A local attacker with standard user access can elevate privileges to SYSTEM. They need local execution or existing low-privileged credentials on the host.

Root cause

Improper access control in the Windows Container Isolation FS Filter Driver (unionfs.sys) allows unauthorized permission modifications.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Install the Microsoft security update for unionfs.sys from the MSRC advisory. If patching must wait, restrict access to hosts running Windows containers.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

Ad · In-content banner

NVD description

Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97792PatchVendor Advisory

Source: nvd.nist.gov/vuln/detail/CVE-2026-97792