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9.3

WatchGuard Fireware OS lets attackers run code remotely

CVE-2026-19315 · published 1 month ago
Summary

The Fireware OS network service called iked can be fooled by specially crafted traffic, letting anyone on the network execute their own programs on the device. This could give an attacker control over the firewall or other connected systems. Apply the latest security update from WatchGuard as soon as possible to close the gap.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
watchguard fireware os < 2026.2.2
< 12.5.20
Original advisory text
Fireware OS Pre-Authentication Type Confusion in iked Allows Remote Code Execution
A type confusion vulnerability in the iked process of WatchGuard Fireware OS allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.3 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-125Out-of-bounds Read
CWE-763Release of Invalid Pointer or Reference
CWE-843Type Confusion
Timeline
Published28 Aug 2026
Updated27 Sep 2026
First seen29 Aug 2026
Sources
CVE-2026-19315 · NVD
CVE-2026-19315 · MITRE
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