Vulnerability · Published Dec 4, 2025 · Assigned by WatchGuard
CVE-2025-12026WatchGuard Firebox Authenticated Out of Bounds Write in certd
High 8.6
In plain English
A high-severity out-of-bounds write in Fireware OS from WatchGuard. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 4.0)8.6High
Exploit odds (30 days)0.5%top 60.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS’s certificate request command could allow an authenticated privileged user to execute arbitrary code via specially crafted CLI commands.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WatchGuard | Fireware OS | 2025.1 – before 2025.1.312.0 – through 12.11.5 |
| WatchGuard | Fireware OS | 12.0 – before 12.5.14 |
Weakness: CWE-787 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://psirt.watchguard.com/CVE-2025-12026 vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00017 vendor-advisory