Vulnerability Intelligence Report
Fireware OS Pre-Authentication Stack Buffer Overflow in iked Allows Remote Code Execution
CVE-2026-19318
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.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
EPSS Probability:0.47%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WatchGuard | Fireware OS | 2025.0 < 2026.2.2 (affected), 12.0 < 12.12.2 (affected) |
| WatchGuard | Fireware OS | 12.0 < 12.5.20 (affected), 2026.3 < 2026.3.1 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.471%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | WatchGuard Technologies, Inc. · Vendor · USA |
| Reserved | 2026-08-07T20:06:03 |
| Published | 2026-08-27T23:24:32 |
| Patch Date | 2026-08-27 |
| Last Updated | 2026-09-03T20:49:55 |
Community Chatter & Buzz