CVE-2026-85328

7.0High

Published 13 Oct 2026 · NVD status: Analyzed · 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-1390

Impact

A local attacker with an existing account can gain elevated privileges on the system. They require local access and must win a race or satisfy specific timing conditions to exploit the flaw.

Root cause

Weak authentication mechanisms within the Windows Projected File System driver permit unauthorized privilege escalation.

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

Install the corresponding Microsoft security update for Windows Projected File System from MSRC. As an interim workaround if patching is delayed and the feature is not needed, disable the Windows Projected File System optional feature.

shell

$ Disable-WindowsOptionalFeature -Online -FeatureName Client-ProjFS

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

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NVD description

Weak authentication in Windows Projected File System allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85328Vendor Advisory

Source: nvd.nist.gov/vuln/detail/CVE-2026-85328