CVE-2026-51638: TOTOLINK T6 vulnerability
Published Aug 28, 2026
·Updated
Incorrect access control in the getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to obtain guest Wi-Fi configuration 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
Which devices are affected?
The affected product identified is the TOTOLINK T6 running firmware version 4.1.5cu.748_B20211015.
2
Does exploitation require authentication or prior access?
No. An unauthenticated attacker can exploit the issue remotely by sending a crafted POST request to /cgi-bin/cstecgi.cgi.
3
What information could an attacker obtain?
The vulnerable getWiFiGuestCfg function may disclose guest Wi-Fi configuration information.