CVE-2026-51655: TOTOLINK T6 vulnerability
Published Aug 28, 2026
·Updated
Incorrect access control in the getMacFilterRules function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to obtain MAC filter rules 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
Who can exploit this issue?
An unauthenticated attacker who can send a crafted POST request to the router’s /cgi-bin/cstecgi.cgi endpoint can obtain MAC filter rules. No valid login is required.
2
Which device and firmware are identified as affected?
The reported affected product is the TOTOLINK T6 running firmware version 4.1.5cu.748_B20211015.
3
What information could be exposed?
The issue allows retrieval of MAC filter rules through the getMacFilterRules function.