Vulnerability Report

CVE-2026-13383

Title: Out-of-bounds Write in WatchGuard Fireware OS ikestubd

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-13383.

CWE Category CWE-787

Published Date Jul 03, 2026

Modified Date Jul 09, 2026

Exploit Status Not Found

Score 8.6 CVSS v4.0

Exploit Probability (EPSS)

0.55%

Vulnerability Summary

CVE-2026-13383: An Out-of-bounds Write vulnerability in WatchGuard Fireware OS ikestubd process could allow an authenticated privileged user to execute arbitrary code via a specially crafted requests to the Management Web UI.This vulnerability affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2.

Impacted Vendors

watchguard 38

Reference Links

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00020

CVSS v4.0

Source Entity 5d1c2695-1a31-4499-88ae-e847036fd7e3

Severity HIGH

8.6

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/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

CVSS v3.1

Source Entity [email protected]