CVE-2026-51716: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the delPortForwardRules function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to delete port-forwarding rules 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
What access does an attacker need to exploit this issue?
The issue can be exploited without authentication by sending a crafted POST request to /cgi-bin/cstecgi.cgi.
2
What is the practical impact of a successful attack?
An attacker can delete port-forwarding rules on the affected device.
3
Which device and firmware are identified as affected?
The reported affected product is the TOTOLINK T6 running firmware version 4.1.5cu.748_B20211015.