CVE-2026-71960: Shenzhen Cudy Technology Co., Ltd p5 v1.1

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

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

• Shenzhen Cudy Technology Co., Ltd p5 v1.1: from 2.4.25, up to and including 2.4.27
• Shenzhen Cudy Technology Co., Ltd WR3000 2.0: before 2.5.24 (fixed in 2.5.24)

Published 2026-08-19. Last modified 2026-09-09.