CVE-2026-71921

Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/
https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-pre-authentication-os-command-injection-via-setget-cgi

Configurations

No configuration.

History

13 Oct 2026, 09:10

Type	Values Removed	Values Added
Summary		(es) Múltiples modelos de DrayTek VigorSwitch contienen una vulnerabilidad de inyección de comandos de preautenticación en la interfaz setget.cgi. La vulnerabilidad es causada por un filtrado insuficiente del campo 'pass' antes de la ejecución de comandos. Un atacante remoto puede activar esta vulnerabilidad a través de una entrada manipulada para ejecutar comandos arbitrarios con privilegios de root.

Information

Published : 2026-08-24 18:17

Updated : 2026-10-13 09:10

NVD link : CVE-2026-71921

Mitre link : CVE-2026-71921

CVE.ORG link : CVE-2026-71921

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges."}, {"lang": "es", "value": "M\u00faltiples modelos de DrayTek VigorSwitch contienen una vulnerabilidad de inyecci\u00f3n de comandos de preautenticaci\u00f3n en la interfaz setget.cgi. La vulnerabilidad es causada por un filtrado insuficiente del campo 'pass' antes de la ejecuci\u00f3n de comandos. Un atacante remoto puede activar esta vulnerabilidad a trav\u00e9s de una entrada manipulada para ejecutar comandos arbitrarios con privilegios de root."}], "lastModified": "2026-10-13T09:10:00.323", "sourceIdentifier": "disclosure@vulncheck.com"}