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CVE-2026-90465
Fireware OS Missing Authentication in FireCluster Sync Allows Privilege Escalation
High8.7EPSS 0.24%
- Published
- Updated
- Reserved
- 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WatchGuardCNA (assigner) | 4.0 | High8.7 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| NVDNVD · Awaiting Analysis | 4.0 | Critical9.4 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Weakness
Affected products
- affected 2025.1 – < 2026.4
- affected 12.0 – < 12.12.4
- affected 12.0 – < 12.5.22
What to do
Solution: Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22
Exploitation: WatchGuard is not aware of any exploitation of this vulnerability in the wild.
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-90465)Record last updated .