CVE-2026-51765: TOTOLINK T6 vulnerability
Published Sep 1, 2026
·Updated
Incorrect access control in the recvIndirectMeshInfo function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to insert or replace mesh neighbor records 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 access does an attacker need to exploit this issue?
The attacker does not need to authenticate. Exploitation requires sending a crafted MQTT message to the device's cs_broker component.
2
What can an attacker change through exploitation?
An attacker can insert new mesh neighbor records or replace existing mesh neighbor records handled by recvIndirectMeshInfo.
3
Which product version is identified as affected?
The reported affected version is TOTOLINK T6 4.1.5cu.748_B20211015.