What’s Vulnerable › Vulnerabilities
CVE-2026-3342: WatchGuard Firebox Out of Bounds Write Vulnerability
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 6.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-03 · updated 2026-06-17
- Weakness: CWE-787
Description
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface. This vulnerability affects Fireware OS 11.9 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.
Affected products
- WatchGuard Fireware OS: from 12.5 before 12.5.17; from 2025.1 before 2026.1.2; from 11.9 before 12.11.8 — fixed in 12.11.8, 12.5.17, 2026.1.2
How to fix
Upgrade to a fixed version: WatchGuard Fireware OS 12.11.8, 12.5.17, 2026.1.2. Check the vendor advisory for mitigations.
References
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