CVE-2026-121565

High CVSS 7.4

Published 2026-11-03 · last changed 2026-11-04

The fix

We hold no Microsoft remediation data for CVE-2026-121565, 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

Tanium addressed an improper certificate validation vulnerability in multiple products. Products have been updated to distrust several intermediate CA certificates associated with compromised private keys.

Sources

NVD record for CVE-2026-121565

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