CVE-2026-51676: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setAccessDeviceCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to alter access-device policies 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·02:17 PM
Description
Frequently Asked Questions
1
Which deployments are exposed to this issue?
The affected product and firmware identified in the available data are TOTOLINK T6 devices running version 4.1.5cu.748_B20211015. Exposure requires that an attacker can send requests to the device's web management CGI endpoint.
2
What does an attacker need to exploit the vulnerability?
No authentication is required. An attacker needs to send a crafted POST request to /cgi-bin/cstecgi.cgi targeting the setAccessDeviceCfg function.
3
What could an attacker change through exploitation?
An attacker can alter access-device policies. The provided information does not specify which individual policy settings can be modified.