CVE-2026-71960 Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT
Attackers can extract a hard-coded JWT secret from the firmware to forge tokens and bypass MQTT authentication, gaining unauthorized access to the router's mesh interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71960?
CVE-2026-71960 is a critical vulnerability in Shenzhen Cudy Technology Co., Ltd. P5 V1.1, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-798
Which versions are affected by CVE-2026-71960?
How do I fix CVE-2026-71960?
No fix has been published for CVE-2026-71960 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-71960 being exploited?
There is no known exploitation of CVE-2026-71960 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-jw4g-pv34-hp37.