CVE-2026-19318: CWE-121 in WatchGuard Fireware OS
Description
A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.
CVSS v4.0
Score 9.3critical
Affected software
WatchGuard
Fireware OS
WatchGuard
Fireware OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a stack-based buffer overflow (CWE-121) in the iked process of WatchGuard Fireware OS. An attacker can remotely trigger this flaw without authentication by sending crafted network packets, potentially leading to arbitrary code execution. The CVSS 4.0 vector indicates it is exploitable over the network with no privileges or user interaction required, and it has high impact on confidentiality, integrity, and availability. The affected versions explicitly include Fireware OS versions =2025.0 and =12.0. No vendor remediation or patch information is currently available.
Potential Impact
Successful exploitation allows remote unauthenticated attackers to execute arbitrary code on the affected device, potentially compromising the system's confidentiality, integrity, and availability. This could lead to full system compromise of the WatchGuard Fireware OS device running the vulnerable iked process.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published by WatchGuard at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-08-07T20:06:03.527Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a90ed89acd9273b494754a0
Added to database: 08/28/2026, 02:08:09 UTC
Last enriched: 09/07/2026, 12:52:32 UTC
Last updated: 10/11/2026, 18:48:17 UTC
Views: 147
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