CVE-2026-51698: TOTOLINK TOTOLINK T6 vulnerability
Published Aug 31, 2026
·Updated
Incorrect access control in the setUrlFilterRules function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to alter browsing policies via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Affected Software
1 affected component
TOTOLINK 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
Who can exploit this issue?
An unauthenticated attacker can exploit it by sending a crafted POST request to /cgi-bin/cstecgi.cgi that reaches the setUrlFilterRules function.
2
What security impact should be investigated?
Successful exploitation allows an attacker to alter the device's browsing policies. Review URL filtering and related browsing-policy settings for unexpected changes.
3
Which device and firmware version are identified as affected?
The affected product identified in the available data is the TOTOLINK T6 running firmware 4.1.5cu.748_B20211015.