EUVD-2026-67337
GHSA-fj8p-qfhx-jffx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Network-reachable unauthenticated IKE listener crash; pure availability impact, no scope change, no confidentiality or integrity effect confirmed.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Lifecycle Timeline
3DescriptionCVE.org
An out-of-bounds read 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.
AnalysisAI
Out-of-bounds read in the WatchGuard Fireware OS iked (Internet Key Exchange daemon) process enables remote unauthenticated attackers to crash VPN processing by sending specially crafted network traffic, resulting in a Denial of Service condition. All Fireware OS versions appear affected per the wildcard CPE, and the vulnerability is reachable without authentication from any network path to the iked listener. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required beyond network reachability to the iked VPN listener: exploitation is unauthenticated, requires no prior session state, and targets the default IKE service (UDP 500/4500) that must be externally reachable for any IPsec VPN to function. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 with vector AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N reflects a network-accessible, low-complexity, unauthenticated DoS with high availability impact on the vulnerable component and no scope change. … 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 | The primary remediation is to apply the vendor-released patch from WatchGuard once available; consult the PSIRT advisory at https://psirt.watchguard.com/CVE-2026-19317 for exact patched version numbers, as none were specified in the available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of WatchGuard Fireware OS appliances, identify their versions and criticality to VPN operations, and contact WatchGuard Support for patch timelines and interim guidance. …
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External POC / Exploit Code
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