CVE-2026-51717: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setOpModeCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to change the device operating mode 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·04:18 PM
Description
Frequently Asked Questions
1
What does an attacker need to exploit this issue?
The attacker needs network access to the device’s web interface and must be able to send a crafted POST request to /cgi-bin/cstecgi.cgi. No authentication is required.
2
Which devices are known to be affected?
The affected product identified in the available information is TOTOLINK T6 running firmware version 4.1.5cu.748_B20211015.
3
What configuration change can an attacker make?
An unauthenticated attacker can change the device operating mode by targeting the setOpModeCfg function.