Filesystem Integrity Bypass in WatchGuard Fireware OS
CVE-2026-3344

6.9MEDIUM

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
3 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-3344?

A critical vulnerability exists within WatchGuard Fireware OS that allows attackers to circumvent filesystem integrity checks. This exploit could enable a malicious actor to achieve limited persistence by deploying a specially crafted firmware update package. The vulnerability affects several versions of Fireware OS, including those from 12.0 through 12.11.7, 12.5.9 through 12.5.16, and also from 2025.1 up to 2026.1.1, posing a significant risk to the integrity of the networking systems relying on these versions.

Affected Version(s)

Fireware OS Default 2025.1 < 2026.1.2

Fireware OS Default 12.0 < 12.11.8

Fireware OS T15/T35 12.0 < 12.5.17

References

https://psirt.watchguard.com/CVE-2026-3344
vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-...
vendor-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.