EUVD-2026-67333
GHSA-w2pv-pjcj-h2vr
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
Pre-auth heap overflow reachable over the network with no interaction (AV:N/AC:L/PR:N/UI:N); RCE on the device yields full C:H/I:H/A:H with scope unchanged.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
Lifecycle Timeline
3DescriptionCVE.org
An heap 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 is possible via a heap overflow (CWE-122) in the iked (IKE/IPsec key management) process, letting a remote unauthenticated attacker run arbitrary code by sending specially crafted network traffic to an affected Firebox firewall. The vendor-assigned CVSS 4.0 base score is 9.3 (critical), reflecting network-reachable, no-privilege, no-interaction exploitation with full confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The affected iked process must be reachable, which in practice means the Firebox has IPsec/IKE VPN services enabled and exposed on the attacker's network path (typically internet-facing UDP/500 and UDP/4500). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals converge on genuine high priority rather than an inflated CVSS. … 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 WatchGuard-provided Fireware OS update as the primary fix; consult the vendor advisory at https://psirt.watchguard.com/CVE-2026-19313 for the exact patched build (Patch available per vendor advisory; released patched version not independently confirmed from the provided data). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct inventory of all WatchGuard Firebox appliances, document firmware versions, and assess exposure to untrusted networks. …
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External POC / Exploit Code
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