CVE-2026-51633: TOTOLINK T6 vulnerability
Published Aug 28, 2026
·Updated
Incorrect access control in the getWiFiEasyGuestCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to obtain simplified guest Wi-Fi configuration, including guest credentials, 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
What does an attacker need to exploit this issue?
The attacker can exploit the issue without authentication by sending a crafted POST request to /cgi-bin/cstecgi.cgi that invokes the getWiFiEasyGuestCfg function.
2
What information could be exposed?
The affected function can disclose simplified guest Wi-Fi configuration information, including guest Wi-Fi credentials.
3
Which device and firmware release are identified as affected?
The issue is reported in the TOTOLINK T6 running firmware 4.1.5cu.748_B20211015.