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

What is CVE-2026-13728?

CVE-2026-13728 is a medium-severity vulnerability in Watchguard Fireware, published on 2 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official 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.

Weakness: CWE-798

Which versions are affected by CVE-2026-13728?

It affects 1 product.

Products include Watchguard Fireware.

How do I fix CVE-2026-13728?

No fix has been published for CVE-2026-13728 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-13728 being exploited?

There is no known exploitation of CVE-2026-13728 in the wild and no public exploit code.

Other vulnerabilities in Watchguard Fireware

• CVE-2022-26318 WatchGuard Firebox and XTM Appliances Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-14733 WatchGuard Firebox Out of Bounds Write Exploited Critical 9.3
• CVE-2025-9242 WatchGuard Firebox Out-of-Bounds Write Exploited Critical 9.3
• CVE-2022-23176 WatchGuard Firebox and XTM Privilege Escalation Exploited High 8.8
• CVE-2022-31789 Integer overflow in n/a Critical 9.8

All Watchguard Fireware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jw2p-m8jh-c458.