CVE-2026-3342
High
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductWatchguard Fireware
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- watchguard fireware12.5.17, 2026.1.2, 12.11.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| watchguard fireware | 12.5 ≤ v < 12.5.17, 2025.1 ≤ v < 2026.1.2, 11.9 ≤ v < 12.11.8 | 12.5.17, 2026.1.2, 12.11.8 |
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