CVE-2026-51722: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setWiFiRepeaterCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to repoint the device to an attacker-controlled upstream Wi-Fi via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Affected Software
1 affected component
TOTOLINK T6=4.1.5cu.748_B20211015
Event History
Aug 31, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·05:17 PM
Description
Frequently Asked Questions
1
What access does an attacker need to exploit this issue?
The attacker does not need to authenticate. Exploitation involves sending a crafted POST request to /cgi-bin/cstecgi.cgi that targets the setWiFiRepeaterCfg function.
2
What could an attacker change on a vulnerable device?
An attacker can repoint the device's upstream Wi-Fi connection to an attacker-controlled wireless network. This could cause the device to connect through infrastructure chosen by the attacker.
3
Which version is identified as affected?
The reported affected version is TOTOLINK T6 4.1.5cu.748_B20211015.