CVE-2026-19844 | TOTOLINK A800R 4.1.2cu.5137_B20200730 ipv6.so /cgi-bin/cstecgi.cgi setRadvdCfg radvdinterfacename stack-based overflow

A vulnerability identified as critical has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow.

This vulnerability is cataloged as CVE-2026-19844. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.