Out-of-bounds Write Vulnerability in WatchGuard Fireware OS
CVE-2026-13384

8.6HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
2 July 2026

What is CVE-2026-13384?

An Out-of-bounds Write vulnerability exists in the WatchGuard Fireware OS within the wgagent process. This security flaw could enable an authenticated privileged user to execute arbitrary code by sending specially crafted requests to the Management Web UI. The vulnerability impacts multiple versions of Fireware OS, specifically versions 12.1 through 12.12 and 2025.1 through 2026.2. For further details, please refer to the vendor advisory.

Affected Version(s)

Fireware OS 12.1 <= 12.12

Fireware OS 12.5 <= 12.5.18

Fireware OS 2025.1 <= 2026.2

References

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

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Cody Sixteen
.