Out-of-bounds Write Vulnerability in WatchGuard Fireware OS
CVE-2026-13053

8.6HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
2 July 2026

What is CVE-2026-13053?

A vulnerability in WatchGuard Fireware OS's command-line interface (CLI) allows an authenticated privileged user to execute arbitrary code through specially crafted commands. This flaw affects multiple versions of Fireware OS, potentially putting systems at risk if exploited. Administrators should upgrade their software to mitigate this serious security issue.

Affected Version(s)

Fireware OS 11.0 <= 11.12.4+541730

Fireware OS 12.0 <= 12.12

Fireware OS 12.5 <= 12.5.18

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

Nicholas Zubrisky (@NZubrisky) of TrendAI Research
.