CVE-2026-51760: TOTOLINK T6 vulnerability
Published Sep 1, 2026
·Updated
Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the csbroker component.
Affected Software
1 affected component
TOTOLINK T6=4.1.5cu.748_B20211015
Event History
Sep 1, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Frequently Asked Questions
1
What must an attacker be able to do to exploit this issue?
An attacker needs to send a crafted MQTT message to the cs_broker component. Authentication is not required.
2
Which devices can be affected by the malicious update activity?
The crafted message can mass-trigger firmware update activity across mesh slave devices.