CVE-2026-19815 | TOTOLINK A800R 4.1.2cu.5137_B20200730 firewall.so /cgi-bin/cstecgi.cgi setParentalRules urlKeyword stack-based overflow

A vulnerability categorized as critical has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected by this vulnerability is the function setParentalRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Executing a manipulation of the argument urlKeyword can lead to stack-based buffer overflow.

This vulnerability is registered as CVE-2026-19815. It is possible to launch the attack remotely. Furthermore, an exploit is available.