CVE-2026-51756

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Incorrect access control in the meshSlaveUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to start firmware flashing using existing upgrade files via sending a crafted MQTT message to the cs_broker component.

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