Critical severity · published Oct 27, 2026
CVE-2026-93865
Fireware OS Missing Authentication in FireCluster Sync Daemon Allows Remote Root Action Injection
New
9.2
CVSS
–
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
2025.1 before 2026.4; 12.0 before 12.12.4; 12.0 before 12.5.22 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93865
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93865
psirt.watchguard.com
https://psirt.watchguard.com/CVE-2026-93865
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