EUVD-2026-64988
GHSA-p299-wp3x-668q
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
Admin credentials required per description sets PR:H; network-accessible web interface gives AV:N; root command execution yields full C/I/A; no scope change as impact stays within the switch OS.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the setDevProto 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 multiple DrayTek VigorSwitch models enables authenticated administrators to execute arbitrary OS commands with root privileges through the setDevProto function's unsanitized username and password fields. At least 10 CPE-confirmed models are affected, with vendor tags suggesting a broader footprint of approximately 28 VigorSwitch variants. …
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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 - the CVSS 4.0 PR:H metric confirms high-privilege authentication is mandatory and is explicitly stated in the CVE description. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 accurately reflects the high impact potential but is tempered by the PR:H requirement - valid administrative credentials are mandatory for exploitation, making this a post-authentication vulnerability rather than an unauthenticated RCE. … 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 released by DrayTek as documented in the security advisory at https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all DrayTek VigorSwitch deployments and identify affected models using CPE confirmation, while auditing which personnel hold administrative credentials and documenting their authentication methods. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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