CVE-2026-71922

Multiple DrayTek VigorSwitch models contain a pre-authentication null pointer dereference vulnerability in the setget.cgi interface. The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

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-null-pointer-dereference-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 desreferencia de puntero nulo de pre-autenticación en la interfaz setget.cgi. La vulnerabilidad es causada por la falta de validación cuyo el campo pass está ausente. Un atacante remoto puede desencadenar esta vulnerabilidad a través de una solicitud manipulada para bloquear el servicio y causar una denegación de servicio.

Information

Published : 2026-08-24 18:17

Updated : 2026-10-13 09:10

NVD link : CVE-2026-71922

Mitre link : CVE-2026-71922

CVE.ORG link : CVE-2026-71922

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service."}, {"lang": "es", "value": "M\u00faltiples modelos de DrayTek VigorSwitch contienen una vulnerabilidad de desreferencia de puntero nulo de pre-autenticaci\u00f3n en la interfaz setget.cgi. La vulnerabilidad es causada por la falta de validaci\u00f3n cuyo el campo pass est\u00e1 ausente. Un atacante remoto puede desencadenar esta vulnerabilidad a trav\u00e9s de una solicitud manipulada para bloquear el servicio y causar una denegaci\u00f3n de servicio."}], "lastModified": "2026-10-13T09:10:00.323", "sourceIdentifier": "disclosure@vulncheck.com"}