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CVE-2026-71960— Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT

Quick assessment

Affected
Shenzhen Cudy Technology Co., Ltd. WR3000 2.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cudy WR3000 2.0 设备上运行 2.5.24 版本之前固件的系统，存在一个硬编码 JWT HMAC 签名密钥的安全漏洞。该漏洞位于 Mosquitto MQTT 代理（broker）的认证插件中。攻击者可以通过从固件镜像中提取该硬编码的密钥，伪造有效的 JWT 令牌。利用提取出的密钥，攻击者可以构造任意 JWT 令牌，无需合法凭据即可向 MQTT 代理进行身份验证，从而未经授权地访问设备的 Mesh 网络接口。

CVSS 9.1 · Critical EPSS 0.40% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 < 2.5.24 affected
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I. Basic Information for CVE-2026-71960

Vulnerability Information
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Vulnerability Title
Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 0 ~ 2.5.24 -

II. Public POCs for CVE-2026-71960

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III. Intelligence Information for CVE-2026-71960

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Vendor Pages for CVE-2026-71960 (1)

Other References for CVE-2026-71960 (1)

IV. Related Vulnerabilities

Same product: WR3000 2.0
Same vendor: Shenzhen Cudy Technology Co., Ltd.
Same weakness: CWE-798

V. Comments for CVE-2026-71960

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