CVE-2026-51763: Critical severity TOTOLINK T6 vulnerability
Published Sep 1, 2026
·Updated
Incorrect access control in the freeStaClient function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to forcibly disconnect wireless clients 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
Data Sourced
via NVD·02:17 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What access does an attacker need to disrupt wireless clients?
An attacker does not need authentication. Exploitation requires sending a crafted MQTT message to the device's cs_broker component.
2
What is the practical impact of successful exploitation?
A successful attacker can forcibly disconnect wireless clients from the affected device.
3
Which product version is identified as affected?
The reported affected version is TOTOLINK T6 4.1.5cu.748_B20211015.