Vulnerability Report

CVE-2026-3342

Title: Out-of-bounds Write in WatchGuard Fireware OS

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-3342.

CWE Category CWE-787

Published Date Mar 03, 2026

Modified Date Mar 04, 2026

Exploit Status Not Found

Score 8.6 CVSS v4.0

Exploit Probability (EPSS)

0.77%

Vulnerability Summary

CVE-2026-3342: 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.

Impacted Vendors

watchguard 38

Reference Links

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

CVSS v4.0

Source Entity 5d1c2695-1a31-4499-88ae-e847036fd7e3

Severity HIGH

8.6

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]