Vulnerability details
CVE-2026-90464
WatchGuard Fireware OS
Fireware OS Missing Command Validation allows Authenticated Arbitrary File Modification as Root
CVSS 4.0
7.2High
Official description
An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel parameters with root privileges by submitting a specially crafted command. Written content is limited to numeric values.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.2High | 4.0 | CVEProject cvelistV5 (CNA) (WatchGuard) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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-2026-90464 vendor-advisory
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Details
- Published
- 2026-10-27
- Last updated
- 2026-11-04
- State
- Published
- Assigner (CNA)
- WatchGuard
Exploit prediction (EPSS)
0.36%
Probability of exploitation in 30 days
30.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-59
- CWE-73
- CWE-732