by Kastro
Paper/Archive/CVE-2026-93865

CVE-2026-93865

WatchGuard Fireware OS — Fireware OS Missing Authentication in FireCluster Sync Daemon Allows Remote Root Action Injection

EPSS 0.5%CVSS 9.2
critical.is priorityof 100
36
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 40.1.401 × 208.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A missing authentication vulnerability in the Fireware OS FireCluster synchronization daemon allows a remote, unauthenticated attacker to invoke privileged system-level administrative actions by sending a specially crafted request to the FireCluster management IP when the clustering feature is enabled.

Affected

ProductAffectedFixed inSource
Fireware OS2025.1 – < 2026.42026.4CNA
Fireware OS12.0 – < 12.12.412.12.4CNA
Fireware OS12.0 – < 12.5.2212.5.22CNA

Scores by source

WatchGuard (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorypsirt.watchguard.com/CVE-2026-93865