CVE-2026-51768

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 Sep 1, 2026
  • CVSS 7.5 high
  • 0.5% chance of exploitation in the next 30 days (EPSS)

CVE-2026-51768 at the National Vulnerability Database