Unauthenticated remote invocation of privileged admin actions on WatchGuard Fireware cluster management—impacts network perimeter security and can disrupt enterprise networks.
CVE-2026-93865
Unauthenticated remote admin actions via Fireware FireCluster sync daemon.
Is CVE-2026-93865 being exploited?
Not confirmed. CVE-2026-93865 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-93865?
CVE-2026-93865 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-93865?
Not known from our data. No patch reference has been recorded for CVE-2026-93865, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-93865 affect?
CVE-2026-93865 affects WatchGuard Fireware OS (FireCluster sync daemon), Firebox appliances with clustering enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-93865?
Restrict cluster mgmt IP access, disable clustering if unused, monitor logs, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote, unauthenticated attacker can invoke privileged admin actions on clustered Fireware devices, enabling config changes, control, or network compromise.
Immediate action required
- affected>= 2025.1 and < 2026.4
- affected>= 12.0 and < 12.12.4
- affected>= 12.0 and < 12.5.22
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.