CVE-2026-19316: CWE-415 in WatchGuard Fireware OS
Description
A double-free vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
CVSS v4.0
Score 8.7high
Affected software
WatchGuard
Fireware OS
WatchGuard
Fireware OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a double-free flaw (CWE-415) in the iked process of WatchGuard Fireware OS. An attacker without authentication can exploit this by sending crafted network packets to trigger a double-free condition, leading to a denial of service in VPN processing. The CVSS 4.0 score is 8.7, indicating high severity with network attack vector, no required privileges or user interaction, and high impact on availability. The affected versions explicitly include =2025.0, =12.0, and 2026.3. There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation causes a denial of service condition in the VPN processing component of Fireware OS, potentially disrupting VPN connectivity and availability for users relying on the affected versions. There is no indication of code execution or data compromise from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, monitor for updates from WatchGuard and consider temporary network controls to limit exposure to untrusted sources if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-08-07T20:05:58.083Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a90ed89acd9273b4947549c
Added to database: 08/28/2026, 02:08:09 UTC
Last enriched: 09/07/2026, 12:52:21 UTC
Last updated: 10/10/2026, 18:48:17 UTC
Views: 87
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