CVE-2026-66890

Critical CVSS 9.6

Published 2026-09-15 · last changed 2026-09-18

The fix

We hold no Microsoft remediation data for CVE-2026-66890, 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

The affected products use hard-coded credentials, which could allow remote access to files with root privileges where FTP is reachable.

Sources

NVD record for CVE-2026-66890

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