CVE-2026-51619: TOTOLINK T6 vulnerability
Published Aug 28, 2026
·Updated
Incorrect access control in the getOnlineClient function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to obtain online client information 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 28, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Frequently Asked Questions
1
What access does an attacker need to retrieve the online client information?
No authentication is required. An attacker can exploit the issue by sending a crafted POST request to /cgi-bin/cstecgi.cgi targeting the getOnlineClient function.
2
Which device and firmware version are identified as affected?
The reported affected product is the TOTOLINK T6 running firmware 4.1.5cu.748_B20211015.