EUVD-2026-67330
GHSA-hj2q-w426-x635
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Remote unauthenticated IKE parsing reached before VPN auth gives AV:N/AC:L/PR:N/UI:N; memory-corruption RCE on the appliance yields C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Remote code execution in WatchGuard Fireware OS affects the iked (IKE/IPsec VPN key-exchange) daemon, where a stack-based buffer overflow lets a remote, unauthenticated attacker run arbitrary code by sending specially crafted network traffic. Because iked terminates VPN negotiations at the network edge, any Firebox appliance exposing IKE/IPsec is reachable pre-authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The affected Firebox must expose the iked (IKE/IPsec VPN key-exchange) service to the attacker - i.e., an IPsec VPN feature (Mobile VPN with IPsec or branch-office IPsec) is enabled and UDP 500/4500 is reachable from the attacker's network position. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This rates as a genuine high priority, not an inflated CVSS number. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the fixed Fireware OS release identified in the WatchGuard PSIRT advisory (https://psirt.watchguard.com/CVE-2026-19318) - patch available per vendor advisory; an exact fixed version is not included in the provided data, so confirm the target build directly from that advisory rather than assuming one. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all WatchGuard Firebox appliances and document firmware versions; disable IKE/IPsec services where operationally feasible or restrict IPsec access to trusted source IP ranges only. …
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External POC / Exploit Code
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