CVE-2026-51742

Incorrect access control in the discoverWan function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger WAN discovery logic via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

• Published Sep 1, 2026
• CVSS 5.9 medium
• 0.4% chance of exploitation in the next 30 days (EPSS)

CVE-2026-51742 at the National Vulnerability Database