Security Advisory
CVE-2026-51760
9.8
CRITICAL
Vulnerability Description
Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the cs_broker component.
Published Date
September 1, 2026
Official Source
NIST NVD Advisory