EUVD-2026-65439
GHSA-6fjc-c8m9-93pm
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Adjacent unauthenticated RCE, no user interaction (AV:A/AC:L/PR:N/UI:N); scope changed (S:C) since the 4.0 vector shows subsequent-system impact, with full C/I/A loss.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
Lifecycle Timeline
3DescriptionCVE.org
A path traversal vulnerability in WatchGuard Agent allows a remote, unauthenticated attacker on an adjacent network to execute arbitrary code on an affected system.
AnalysisAI
Remote code execution in WatchGuard Agent lets an unauthenticated attacker positioned on an adjacent network chain a missing-authentication weakness (CWE-306) with path traversal into arbitrary code execution on the host. Rated CVSS 4.0 9.4 (Critical) by WatchGuard, the flaw combines an authentication bypass with directory traversal so no credentials or user interaction are required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be on an adjacent network (CVSS AV:A) - the same local/broadcast or logically adjacent segment as the target - rather than routable across the open internet; this adjacency is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are largely aligned toward high priority. … 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 | Patch available per vendor advisory - consult the WatchGuard PSIRT advisory at https://psirt.watchguard.com/CVE-2026-57909 for the fixed version and upgrade WatchGuard Agent to it across all endpoints; an exact patched version number is not present in the provided data and should be taken from that advisory rather than assumed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running WatchGuard Agent and restrict network access using firewall rules and network segmentation to limit traffic from adjacent networks; enable enhanced logging and alerting on WatchGuard Agent processes. …
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Same technique Path Traversal
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External POC / Exploit Code
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