Vendor：http://totolink.net/
Firmware：https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/259/ids/36.html
V2.0.0-B20230727.1043
sub_41815C (handle function of formDMZ) of /bin/boa in firmware has buffer overflow vulnerability.
Parameter "submit_url" is read from HTTP request into $s1_1
$s1_1 is used as 2nd parameter in sub_40bddc at 0x4184ac
arg2 is assigned to $s2, stack variable var_120 is constructed using sprintf. When arg2 has excessive length, this would result an stack buffer overflow.
I'm not able to provide full exploit for this vulnerability due to legal reasons.