Vulnerability · Published Jul 2, 2026 · Assigned by WatchGuard
CVE-2026-13053WatchGuard Firebox Authenticated Out of Bounds Write in Management CLI Command Handler
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 0.6% (higher than 51% of all known vulnerabilities).
Severity (CVSS 4.0)8.6High
Exploit odds (30 days)0.6%top 49.0% 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 CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WatchGuard | Fireware OS | 2025.1 – before 2026.2.112.0 – before 12.12.111.0 – before * |
| WatchGuard | Fireware OS | 12.0 – before 12.11.9 |
| WatchGuard | Fireware OS | 12.0 – before 12.5.19 |
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-2026-13053 vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00030 vendor-advisory