by Kastro
Paper/Archive/CVE-2026-71960

CVE-2026-71960

Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 — Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT

EPSS 0.5%CVSS 9.3
critical.is priorityof 100
37
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 45.1.451 × 209.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
WR3000 2.0< 2.5.242.5.24CNA
P5 V1.12.4.25 – 2.4.27–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refcudy.com/en-us/pages/download-center/wr3000-2-0writeupvulncheck.com/advisories/cudy-wr3000-hard-coded-jwt-secret-authentication-bypass-via-mqtt