CVE-2026-51737: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the clearTracerouteLog function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to erase traceroute 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
Aug 31, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·08:17 PM
Description
Frequently Asked Questions
1
Which deployments are exposed?
TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 are affected. The issue is reachable through the device's CGI endpoint.
2
Does an attacker need to authenticate first?
No. An unauthenticated attacker can exploit the issue by sending a crafted POST request to /cgi-bin/cstecgi.cgi.
3
What is the impact of successful exploitation?
An attacker can erase traceroute logs through the clearTracerouteLog function.