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Vulnerability record · CVE-2026-13728 · published 3 July 2026

CVE-2026-13728: Watchguard fireware hard-coded credentials vulnerability

Watchguard · Fireware

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.

5.9 CVSS 4.0 Medium EPSS 0.23% · top 87.5% CWE-798 · Hard-coded credentials
5.9CVSS 4.0 base score
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
28 Aug 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://psirt.watchguard.com/CVE-2026-13728
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-13728), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.