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Vulnerability in Totolink EX1200L router software
23 June 2026 | CERT Polska | #vulnerability, #warning, #cve
CVE ID CVE-2026-44089
Publication date 23 June 2026
Vendor Totolink
Product EX1200L
Vulnerable versions 9.3.5u.6146_B20201023
Vulnerability type (CWE) Stack-based Buffer Overflow (CWE-121)
Report source Report to CERT Polska

Description

CERT Polska has received a report about vulnerability in Totolink EX1200L router software and participated in coordination of its disclosure.

The vulnerability CVE-2026-44089: 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 an unauthenticated 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.

Credits

We thank Franciszek Malek for the responsible vulnerability report.

More about the coordinated vulnerability disclosure process at CERT Polska can be found at https://cert.pl/en/cvd/.