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OpenAdvisories
High · 8.7 CVE-2026-90465 EUVD-2026-111146GHSA-rwrf-f344-f6wx

Fireware OS Missing Authentication in FireCluster Sync Allows Privilege Escalation

Published Oct 27, 2026 · Updated Oct 29, 2026 · Assigned by WatchGuard

Description

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.

Affected products

VendorProductAffectedFixed
WatchGuard Fireware OS 2025.1 – < 2026.4, 12.0 – < 12.12.4, 12.0 – < 12.5.22 2026.4

Advisories 1

References