CVE-2026-51741: TOTOLINK T6 vulnerability
Published Sep 1, 2026
·Updated
Incorrect access control in the clearDiagnosisLog function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to erase diagnosis logs 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
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
Who can exploit this issue?
Any unauthenticated attacker who can send requests to the affected device's web management interface can exploit it. The disclosed impact is deletion of diagnosis logs.
2
What request path is involved?
The vulnerable function is reached through a crafted POST request to /cgi-bin/cstecgi.cgi. The affected function is clearDiagnosisLog.
3
How can I determine whether a device is affected?
The disclosed affected product and firmware version are TOTOLINK T6 running 4.1.5cu.748_B20211015. Systems not matching that product and version are not identified by the provided data.