EUVD-2026-64992
GHSA-x2c7-pf46-x3p9
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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
Network-accessible management plane with no auth required; integrity and availability both High; scope unchanged as impact is confined to the switch itself.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
Multiple DrayTek VigorSwitch models contain unauthorized operation vulnerabilities in multiple syslog functions. The vulnerability is caused by missing authorization checks. A remote attacker can trigger these vulnerabilities via crafted requests to modify configuration, restart services, save startup configuration, or clear logs.
AnalysisAI
Unauthorized operation vulnerabilities in multiple DrayTek VigorSwitch managed switch models allow unauthenticated remote attackers to manipulate device state - including modifying configuration, restarting services, overwriting startup configuration, and clearing audit logs - without any authentication. Affecting at least 28 named VigorSwitch models across the G, P, PQ, Q, and FX series, the root cause is missing authorization checks in multiple syslog-related HTTP handler functions (CWE-862). …
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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 VigorSwitch management interface (HTTP or HTTPS). … 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/VC:N/VI:H/VA:H) presents the strongest possible network exploitation profile: no authentication, no user interaction, no attack complexity, and no special target conditions required. … 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 DrayTek security advisory at https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/ for vendor-released firmware patches; no specific fixed version number was included in the available input data, so organizations should check that advisory directly for model-specific patch versions. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct a complete inventory of all DrayTek VigorSwitch models in production (G, P, PQ, Q, FX series) and implement firewall rules to restrict management interface access exclusively to trusted administrative networks, denying all other access. …
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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