Vulnerability details
CVE-2026-93865
WatchGuard Fireware OS
Fireware OS Missing Authentication in FireCluster Sync Daemon Allows Remote Root Action Injection
CVSS 4.0
9.2Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (WatchGuard) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| WatchGuard | Fireware OS | 12.0 ≤ v < 12.12.4 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 12.0 ≤ v < 12.5.22 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 2025.1 ≤ v < 2026.4 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://psirt.watchguard.com/CVE-2026-93865 vendor-advisory
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Details
- Published
- 2026-10-27
- Last updated
- 2026-10-29
- State
- Published
- Assigner (CNA)
- WatchGuard
- Kolun priority
- 24 · Low
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-306
- CWE-77
- CWE-862