EUVD-2026-65438
GHSA-6c89-2v98-5qj2
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
Unauthenticated network-reachable missing-auth flaw (PR:N/AV:N/AC:L/UI:N) yielding privileged arbitrary code execution, so full C/I/A impact; scope unchanged as impact stays on the host.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
Lifecycle Timeline
3DescriptionCVE.org
Improper authentication in the WatchGuard Agent allows an unauthenticated attacker with network access to cause the agent to execute arbitrary code with elevated privileges.
AnalysisAI
Remote code execution in the WatchGuard Agent allows an unauthenticated attacker with network access to trigger arbitrary code execution at elevated privilege due to an improper authentication flaw (CWE-306). The CVSS 4.0 base score of 9.3 reflects a network-reachable, no-interaction, no-privilege attack yielding full confidentiality, integrity, and availability impact on the affected host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The required precondition is network access to a host running the WatchGuard Agent with its listening service reachable by the attacker (AV:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high priority rather than 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 | Patch available per vendor advisory: consult the WatchGuard PSIRT advisory at https://psirt.watchguard.com/CVE-2026-57910 and upgrade the WatchGuard Agent to the fixed version specified there (an exact fixed version was not included in the provided data and must be taken from the advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct a complete inventory of all WatchGuard Agent deployments; identify instances reachable from untrusted networks and implement emergency firewall rules to restrict inbound access to WatchGuard Agent listening ports. …
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External POC / Exploit Code
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