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.

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Affected Version(s)

Fireware OS 12.0 <= 12.11.7

Fireware OS 12.5.9 <= 12.5.16

Fireware OS 2025.1 <= 2026.1.1

References

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

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

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