CVE-2026-51688: TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setWiFiSignalCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to reduce wireless power or cause a Denial of Service (DoS) 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·03:17 PM
Description
Frequently Asked Questions
1
Which systems are exposed to this issue?
TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 are identified as affected. The vulnerable functionality is reachable through the device's /cgi-bin/cstecgi.cgi endpoint.
2
Does an attacker need to authenticate first?
No. The issue can be exploited by an unauthenticated attacker using a crafted POST request.
3
What impact can exploitation have?
An attacker can reduce the device's wireless transmission power or cause a denial of service affecting wireless operation.