CVE-2026-90465

A missing authentication vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, to invoke privileged firewall management actions as root by sending a specially crafted request.

Score

CVSS 4.0 9.4 Critical

Status

Awaiting Analysis - 5d1c2695-1a31-4499-88ae-e847036fd7e3

Published

2026-10-27

Last modified

2026-10-28

Weaknesses

CWE-290, CWE-306, CWE-77, CWE-862

Affected products

• Fireware Os (Watchguard)

References

• https://psirt.watchguard.com/CVE-2026-90465