What’s Vulnerable › Vulnerabilities

CVE-2026-13728: WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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-798

Description

In exception circumstances, WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal resources. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.

Affected products

• WatchGuard Fireware OS: from 12.1 before 12.12.1; from 2025.1 before 2026.2.1 — 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-2026-13728
• https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025

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