CVE-2026-51768

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Incorrect access control in the setElinkQosConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to modify privileged QoS policy on the master device via sending a crafted MQTT message to the cs_broker component.

Published 2026-09-01. Last modified 2026-09-02.