CVE-2026-51630

Incorrect access control in the getDdnsCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain DDNS configuration, including domain, username, and password, via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

• Published Aug 28, 2026
• CVSS 4.3 medium
• 0.3% chance of exploitation in the next 30 days (EPSS)

CVE-2026-51630 at the National Vulnerability Database