EUVD-2026-67335
GHSA-hjxc-cxcg-9xjh
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
Remote unauthenticated network exploitation with no complexity; impact is DoS-only so availability is High and confidentiality and integrity are None, scope unchanged.
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
A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
AnalysisAI
Stack-based buffer overflow in the iked (IKE daemon) process of WatchGuard Fireware OS allows a remote unauthenticated attacker to crash VPN processing via specially crafted network traffic, causing a denial-of-service condition on affected Firebox appliances. Any Firebox with IPsec VPN exposed to untrusted networks is at risk across an unspecified range of Fireware OS versions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The iked process must be running and reachable on UDP port 500 (or UDP 4500 for NAT-T), which is the default operational state on any WatchGuard Firebox with IPsec VPN enabled. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) confirms remote, unauthenticated, low-complexity exploitation with high availability impact, consistent with an internet-exposed daemon that processes unauthenticated IKE initiation messages before any credential exchange occurs. … 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 | Consult the WatchGuard PSIRT advisory at https://psirt.watchguard.com/CVE-2026-78010 for the specific patched Fireware OS version - the available intelligence does not include an explicit fix version and one should not be assumed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an asset inventory of all Firebox appliances in production, identify which versions of Fireware OS are deployed, and confirm IPsec VPN exposure to untrusted networks. …
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External POC / Exploit Code
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