CVE-2026-13728: CWE-798 in WatchGuard Fireware OS
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.
AI Analysis
Technical Summary
This vulnerability involves the use of a hard-coded encryption key within WatchGuard Fireware OS on FireCluster configurations when encrypting saved credentials for Access Portal resources. The presence of a hard-coded key (CWE-798) can potentially allow attackers with appropriate access to decrypt sensitive credentials. The flaw is limited to FireCluster deployments with Access Portal enabled and does not impact standalone Fireboxes or devices lacking this feature. The CVSS 4.0 base score is 5.9, indicating medium severity. No vendor advisory or patch information is currently provided.
Potential Impact
The vulnerability could allow an attacker with high privileges to decrypt saved Access Portal credentials due to the use of a hard-coded encryption key. This exposure could lead to credential compromise within affected FireCluster environments. Devices not supporting Access Portal or standalone Fireboxes are not impacted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, administrators should consider limiting Access Portal usage on FireClusters or applying compensating controls to protect credential confidentiality. Monitor WatchGuard advisories for updates.
CVE-2026-13728: CWE-798 in WatchGuard Fireware OS
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 v4.0
Score 5.9medium
Affected software
pkg:github/watchguard/fireware-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the use of a hard-coded encryption key within WatchGuard Fireware OS on FireCluster configurations when encrypting saved credentials for Access Portal resources. The presence of a hard-coded key (CWE-798) can potentially allow attackers with appropriate access to decrypt sensitive credentials. The flaw is limited to FireCluster deployments with Access Portal enabled and does not impact standalone Fireboxes or devices lacking this feature. The CVSS 4.0 base score is 5.9, indicating medium severity. No vendor advisory or patch information is currently provided.
Potential Impact
The vulnerability could allow an attacker with high privileges to decrypt saved Access Portal credentials due to the use of a hard-coded encryption key. This exposure could lead to credential compromise within affected FireCluster environments. Devices not supporting Access Portal or standalone Fireboxes are not impacted.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, administrators should consider limiting Access Portal usage on FireClusters or applying compensating controls to protect credential confidentiality. Monitor WatchGuard advisories for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-06-29T14:36:27.889Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a46f28127e9c797194ffff3
Added to database: 07/02/2026, 23:21:37 UTC
Last enriched: 08/11/2026, 13:55:12 UTC
Last updated: 08/15/2026, 15:12:49 UTC
Views: 78
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