What’s Vulnerable › Vulnerabilities

CVE-2026-13053: WatchGuard Firebox Authenticated Out of Bounds Write in Management CLI Command Handler

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-03 · updated 2026-10-25
• Weakness: CWE-787

Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command.

Affected products

• WatchGuard Fireware OS: from 11.0 before 12.12.1; from 2025.1 before 2026.2.1; from 11.0 through 12.5.18 — fixed in 12.12.1, 2026.2.1

How to fix

Upgrade to a fixed version: WatchGuard Fireware OS 12.12.1, 2026.2.1. Check the vendor advisory for mitigations.

References

• https://psirt.watchguard.com/CVE-2026-13053
• https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00030

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