CVE-2026-44089: Totolink EX1200L

Critical severity, CVSS 9.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Totolink EX1200L router is vulnerable to Buffer Overflow in the login functionality in cgi-bin/cstecgi.cgi endpoint. This vulnerability could be exploited to cause the program to crash and to execute code remotely. This allows the attacker to perform actions as root including reading and editing data, as well as bricking the router. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 9.3.5u.6146_B20201023 but may also affect other versions.

Affected products

• Totolink EX1200L: version 9.3.5u.6146_B20201023 only

Published 2026-06-23. Last modified 2026-06-23.