ZDI-26-499: WatchGuard FireWare OS cli Token Parser Stack-based Buffer Overflow Remote Code Execution Vulnerability
Published Jul 29, 2026
·Updated
This vulnerability allows remote attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 4.7. The following CVEs are assigned: CVE-2026-13053.
Affected Software
1 affected component
WatchGuard Fireware OS
Event History
Jul 29, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
What is the severity of ZDI-26-499?
The CVSS rating for ZDI-26-499 is 4.7, indicating a medium severity risk.
2
How do I fix ZDI-26-499?
To mitigate ZDI-26-499, ensure that your WatchGuard FireWare OS is updated to the latest version provided by the vendor.
3
What type of vulnerability is ZDI-26-499?
ZDI-26-499 is a stack-based buffer overflow vulnerability that allows remote code execution.
4
Is authentication required to exploit ZDI-26-499?
Yes, authentication is required for an attacker to exploit ZDI-26-499.
5
Which software is affected by ZDI-26-499?
ZDI-26-499 affects installations of WatchGuard FireWare OS.