CVE-2026-51743: TOTOLINK T6 vulnerability
Published Sep 1, 2026
·Updated
Incorrect access control in the guestwifisync function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to disable guest virtual AP interfaces 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·01:19 PM
Description
Frequently Asked Questions
1
What access does an attacker need to exploit this issue?
An attacker does not need to authenticate. 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 disable guest virtual AP interfaces, disrupting guest Wi-Fi availability.
3
Which device version is identified as affected?
The affected product and version identified are TOTOLINK T6 firmware 4.1.5cu.748_B20211015.