Vulnerability · Published Jul 2, 2026 · Assigned by WatchGuard
CVE-2026-13728WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database
Medium 5.9
In plain English
A medium-severity hard-coded credentials in Fireware OS from WatchGuard. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 4.0)5.9Medium
Exploit odds (30 days)0.2%top 86.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WatchGuard | Fireware OS | 2025.1 – before 2026.2.112.0 – before 12.12.1 |
| WatchGuard | Fireware OS | 12.0 – before 12.11.9 |
Weakness: CWE-798 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
References
- https://psirt.watchguard.com/CVE-2026-13728 vendor-advisory
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025 vendor-advisory