CVE-2026-19813 | TOTOLINK A800R 4.1.2cu.5137_B20200730 firewall.so /cgi-bin/cstecgi.cgi setMacFilterRules Comment stack-based overflow

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. It has been declared as critical. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow.

This vulnerability is listed as CVE-2026-19813. The attack may be performed from remote. In addition, an exploit is available.