CVE-2026-51678: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setSyslogCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to alter logging behavior 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 systems are exposed to this issue?
TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 are identified as affected. The vulnerable functionality is reachable through the device's web interface endpoint at /cgi-bin/cstecgi.cgi.
2
What does an attacker need to exploit it?
An attacker does not need to authenticate. Exploitation requires sending a crafted POST request to /cgi-bin/cstecgi.cgi targeting the setSyslogCfg function.
3
What is the impact of successful exploitation?
A successful attacker can alter the device's logging behavior. This may affect the availability or reliability of logs used for monitoring and investigation.