Vulnerability · Published Aug 19, 2026 · Assigned by VulnCheck

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

Critical 9.1

In plain English

A critical-severity hard-coded credentials in P5 V1.1 from Shenzhen Cudy Technology Co., Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.5%top 54.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Shenzhen Cudy Technology Co., Ltd.	WR3000 2.0	0 – before 2.5.24
Shenzhen Cudy Technology Co., Ltd.	P5 V1.1	2.4.25 – through 2.4.27

Weakness: CWE-798 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Release Notes release-notes
https://www.vulncheck.com/advisories/cudy-wr3000-hard-coded-jwt-secret-authentication-bypass-via-mqtt third-party-advisory