Out-of-bounds Write Vulnerability in WatchGuard Fireware OS
CVE-2026-13383

8.6HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
2 July 2026

What is CVE-2026-13383?

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's ikestubd process allows an authenticated privileged user to execute arbitrary code through specially crafted requests sent to the Management Web UI. This security flaw impacts multiple versions of Fireware OS, ranging from 12.1 to 12.12 and from 2025.1 to 2026.2, potentially compromising system integrity and exposing sensitive data.

Affected Version(s)

Fireware OS 12.1 <= 12.12

Fireware OS 12.5 <= 12.5.18

Fireware OS 2025.1 <= 2026.2

References

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

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Cody Sixteen
.