CVE-2026-71960

Cudy WR3000 2.0 running firmware before 2.5.24 contains a hard-coded JWT HMAC signing secret vulnerability in the Mosquitto MQTT broker's authentication plugin that allows unauthenticated attackers to forge valid JWT tokens by extracting the secret from the firmware image. Attackers can use the extracted secret to craft arbitrary JWT tokens and authenticate to the MQTT broker without legitimate credentials, gaining unauthorized access to the device's mesh networking interface.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.cudy.com/en-us/pages/download-center/wr3000-2-0
https://www.vulncheck.com/advisories/cudy-wr3000-hard-coded-jwt-secret-authentication-bypass-via-mqtt

Configurations

No configuration.

History

27 Oct 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) Cudy WR3000 2.0 ejecutando firmware anterior a 2.5.24 contiene una vulnerabilidad de secreto de firma HMAC JWT codificado de forma rígida en el plugin de autenticación del broker MQTT Mosquitto que permite a atacantes no autenticados forjar tokens JWT válidos extrayendo el secreto de la imagen del firmware. Los atacantes pueden usar el secreto extraído para crear tokens JWT arbitrarios y autenticarse en el broker MQTT sin credenciales legítimas, obteniendo acceso no autorizado a la interfaz de red en malla del dispositivo.

Information

Published : 2026-08-19 15:18

Updated : 2026-10-27 11:10

NVD link : CVE-2026-71960

Mitre link : CVE-2026-71960

CVE.ORG link : CVE-2026-71960

JSON object : View

Products Affected

No product.

CWE

CWE-798

Use of Hard-coded Credentials

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