CVE-2026-71911

Multiple DrayTek VigorAP models contain a buffer overflow vulnerability in the setLan function. The vulnerability is caused by missing length checks during memory copy operations involving the lanVlanId0, lanIp, and lanNetmask fields. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. 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-remote-code-execution-and-buffer-overflow-vulnerabilities-in-vigorap-series-august-2026/
https://www.vulncheck.com/advisories/draytek-vigorap-multiple-models-buffer-overflow-via-setlan

Configurations

No configuration.

History

13 Oct 2026, 09:10

Type	Values Removed	Values Added
Summary		(es) Múltiples modelos DrayTek VigorAP contienen una vulnerabilidad de desbordamiento de búfer en la función setLan. La vulnerabilidad es causada por la falta de comprobaciones de longitud durante las operaciones de copia de memoria que involucran los campos lanVlanId0, lanIp y lanNetmask. Un atacante remoto puede desencadenar esta vulnerabilidad mediante una entrada manipulada, causando una denegación de servicio o potencialmente ejecutando comandos arbitrarios. 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-2026-71911

Mitre link : CVE-2026-71911

CVE.ORG link : CVE-2026-71911

JSON object : View

Products Affected

No product.

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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