CVE-2026-71918

Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the webBackupAction function. The vulnerability is caused by insufficient filtering of the option, key, pw_encode, pathN, and valueN 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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

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-os-command-injection-via-webbackupaction

Configurations

No configuration.

History

13 Oct 2026, 09:10

Type	Values Removed	Values Added
Summary		(es) Múltiples modelos DrayTek VigorSwitch contienen una vulnerabilidad de inyección de comandos en la función webBackupAction. La vulnerabilidad es causada por un filtrado insuficiente de los campos option, key, pw_encode, pathN y valueN 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. La explotación requiere credenciales administrativas válidas para la interfaz de gestión web del dispositivo.

Information

Published : 2026-08-24 18:17

Updated : 2026-10-13 09:10

NVD link : CVE-2026-71918

Mitre link : CVE-2026-71918

CVE.ORG link : CVE-2026-71918

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 option, key, pw_encode, pathN, and valueN 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."}, {"lang": "es", "value": "M\u00faltiples modelos DrayTek VigorSwitch contienen una vulnerabilidad de inyecci\u00f3n de comandos en la funci\u00f3n webBackupAction. La vulnerabilidad es causada por un filtrado insuficiente de los campos option, key, pw_encode, pathN y valueN 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. La explotaci\u00f3n requiere credenciales administrativas v\u00e1lidas para la interfaz de gesti\u00f3n web del dispositivo."}], "lastModified": "2026-10-13T09:10:00.323", "sourceIdentifier": "disclosure@vulncheck.com"}