EUVD-2026-64983
GHSA-fx6v-6m5w-g9mj
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
Network-accessible management interface (AV:N) but administrative credentials required (PR:H); full CIA impact on the device with no scope change (S:U) since only the vulnerable switch is compromised.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
Lifecycle Timeline
3DescriptionCVE.org
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the getVid function. The vulnerability is caused by insufficient filtering of the username and password fields before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges. Exploitation requires valid administrative credentials for the device's web management interface.
AnalysisAI
Command injection in DrayTek VigorSwitch's getVid function allows an authenticated remote administrator to execute arbitrary OS commands with root privileges by supplying crafted values in the username or password fields of the web management interface. At least 28 VigorSwitch models across the G, P, Q, PQ, and FX series are confirmed affected by the DrayTek August 2026 security advisory and VulnCheck reporting. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires valid administrative credentials for the DrayTek VigorSwitch web management interface - this prerequisite is explicitly stated in the CVE description and confirmed by the CVSS 4.0 PR:H metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 is principally driven by the full-impact triad (VC:H/VI:H/VA:H) and network attack vector, but the PR:H metric is the decisive mitigating signal - exploitation is gated on possession of valid administrative credentials for the web management interface, sharply narrowing the realistic attacker class. … 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 firmware update specified in the DrayTek security advisory at https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/ - that advisory is the primary source for exact patched firmware version numbers, which are not independently specified in the intelligence data available at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all DrayTek VigorSwitch units in operation and identify which models fall within the vulnerable G, P, Q, PQ, and FX series; immediately restrict web management interface access to trusted administrative IP addresses only and disable remote HTTP/HTTPS management where feasible. …
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Same weakness CWE-78 – OS Command Injection
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External POC / Exploit Code
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