Vulnerability Intelligence Report
WatchGuard Firebox iked Out of Bounds Write Vulnerability
CVE-2025-9242
An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.3
CRITICAL
EPSS Probability:91.12%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-787 ↗CWE-787
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WatchGuard | Fireware OS | 11.0 <= 11.12.4+541730 (affected), 12.0 < 12.11.4 (affected), 2025.0 < 2025.1.1 (affected) |
| WatchGuard | Fireware OS | 12.0 < 12.3.1+722811 (affected) |
| WatchGuard | Fireware OS | 12.0 < 12.5.13 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
91.121%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | WatchGuard Technologies, Inc. · Vendor · USA |
| Reserved | 2025-08-20T11:08:20 |
| Published | 2025-09-17T07:29:23 |
| Patch Date | 2025-09-17 |
| Last Updated | 2026-08-10T15:28:40 |
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