PT-2026-55337 · Watchguard · Fireware Os

Cody Sixteen · Published 2026-07-02 · Updated 2026-07-03 · CVE-2026-13728

Positive Technologies (AI Summary)

CVSS v4.0

5.9

Medium

Base vector

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:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 12.1 through 12.12 WatchGuard Fireware OS versions 2025.1 through 2026.2

Description WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal resources under exceptional circumstances. This issue specifically affects devices deployed in a FireCluster that support the Access Portal feature.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2026-13728

Affected Products

Fireware Os

References · 4

• https://watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-13728 · Security Note
• https://twitter.com/infoflowcloud/status/2072868241345597666 · Twitter Post
• https://twitter.com/CVEnew/status/2072867220145737807 · Twitter Post