CVE-2026-13728

Analyzed Analyzed - Analysis Complete

Hard-Coded Encryption Key in WatchGuard Fireware OS

Publication date: 2026-07-03

Last updated on: 2026-08-10

Assigner: WatchGuard Technologies, Inc.

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 Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-03

Last Modified

2026-08-10

Generated

2026-08-12

AI Q&A

2026-07-03

EPSS Evaluated

2026-08-11

NVD

CVE-2026-13728

EUVD

EUVD-2026-41458

Affected Vendors & Products

Vendor	Product	Version / Range
watchguard	fireware	From 12.1 (inc) to 12.12.1 (exc)
watchguard	fireware	From 2025.1 (inc) to 2026.2.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-798	The product contains hard-coded credentials, such as a password or cryptographic key.

Attack-Flow Graph

Executive Summary

This vulnerability occurs in WatchGuard Fireware OS running on a FireCluster, where in exceptional circumstances a hard-coded encryption key is used to encrypt saved credentials for Access Portal resources.

It affects Fireware OS versions 12.0 through 12.12 and 2025.1 through 2026.2, but does not impact devices without the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.

Impact Analysis

The use of a hard-coded encryption key to protect saved credentials can potentially allow attackers with access to the encrypted data to decrypt and obtain sensitive credentials.

This could lead to unauthorized access to Access Portal resources, compromising the security of the affected FireCluster environment.

The CVSS score of 5.9 indicates a medium impact, suggesting that while the vulnerability is serious, it requires certain conditions such as privileged access to exploit.

Compliance Impact

The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

Mitigation Strategies

To mitigate this vulnerability, update your WatchGuard Fireware OS on FireCluster devices to versions 12.12.1 or 2026.2.1 or later, where the issue has been resolved.

Ensure that devices without the Access Portal feature or standalone Fireboxes not deployed in a FireCluster are not affected.

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