CVE-2026-3342 PUBLISHED

WatchGuard Firebox Out of Bounds Write Vulnerability

Assigner: WatchGuard
Reserved: 27.02.2026 Published: 03.03.2026 Updated: 03.03.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	WatchGuard
Product	Fireware OS
Versions	Default: unaffected affected from 11.9 to 11.12.4+541730 (incl.) affected from 12.0 to 12.11.7 (incl.) affected from 12.5 to 12.5.16 (incl.) affected from 2025.1 to 2026.1.1 (incl.)

Exploits

WatchGuard is not aware of any exploitation of this issue in the wild.

Credits

btaol finder

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-0003

Problem Types

CWE-787 Out-of-bounds Write CWE

Impacts

CAPEC-253 Remote Code Inclusion