CVE-2026-91843

Critical CVSS 9.8

Published 2026-09-16 · last changed 2026-09-18

The fix

We hold no Microsoft remediation data for CVE-2026-91843, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.

Sources

NVD record for CVE-2026-91843

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H