Hard-Coded Encryption Key Vulnerability in WatchGuard Fireware OS
CVE-2026-13728

5.9MEDIUM

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
2 July 2026

Badges

👾 Exploit Exists

What is CVE-2026-13728?

The vulnerability in WatchGuard Fireware OS arises under specific conditions where a hard-coded encryption key is utilized to encrypt saved credentials for Access Portal resources. This affects a range of versions from 12.1 to 12.12 and from 2025.1 to 2026.2, posing a potential risk to sensitive credential management. However, devices that do not feature the Access Portal capability or standalone Fireboxes not part of a FireCluster remain unaffected.

Affected Version(s)

Fireware OS 2025.1 < 2026.2.1

Fireware OS 12.0 < 12.12.1

References

https://psirt.watchguard.com/CVE-2026-13728
vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-...
vendor-advisory

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Cody Sixteen
.