CVE-2026-85355

7.0High

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

7.0High

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-829

Impact

A local attacker with existing user credentials can elevate privileges to SYSTEM or kernel execution on the machine. Exploitation requires local access to execute code on the target Windows system.

Root cause

The Windows Common Log File System (CLFS) Driver includes functionality from an untrusted control sphere.

Affected systems

Versions not listed — check the vendor advisory.

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

Fix & remediation

Apply the Windows security update addressing this vulnerability from the vendor advisory; no workaround or interim mitigation is documented.

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

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NVD description

Inclusion of functionality from untrusted control sphere in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85355

Source: nvd.nist.gov/vuln/detail/CVE-2026-85355