CVE-2026-51693: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setVpnPassCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to weaken edge filtering 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
Frequently Asked Questions
1
Who is exposed to this issue?
TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 are identified as affected. The vulnerable endpoint is /cgi-bin/cstecgi.cgi.
2
Does exploitation require authentication?
No. The issue can be exploited by an unauthenticated attacker using a crafted POST request.
3
What security control can an attacker affect?
Successful exploitation can weaken edge filtering through the setVpnPassCfg function.