CVE-2026-83585

7.8High

Published 13 Oct 2026 · NVD status: Awaiting Analysis · 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-134

Impact

A local user can elevate privileges to SYSTEM on the affected Windows machine. The attacker needs an existing low-privileged account with local access to trigger it.

Root cause

Windows NTFS uses externally-controlled format strings, allowing improper memory access and execution during file system operations.

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 CVE-2026-83585 from Windows Update or the MSRC portal. No temporary workarounds or config mitigations are documented.

shell

$ UsoClient StartInteractiveScan

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

Ad · In-content banner

NVD description

Use of externally-controlled format string in Windows NTFS allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83585

Source: nvd.nist.gov/vuln/detail/CVE-2026-83585