CVE-2026-51679: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setPasswordCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to change the administrator account 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·02:17 PM
Description
Frequently Asked Questions
1
What does an attacker need to exploit this issue?
An attacker only needs to send a crafted POST request to /cgi-bin/cstecgi.cgi. Authentication is not required.
2
What is the impact of successful exploitation?
An attacker can change the router's administrator account, which can result in unauthorized administrative control.
3
Which product version is identified as affected?
The issue is identified in TOTOLINK T6 firmware version 4.1.5cu.748_B20211015.