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_44ACB8 (handle function of formDosCfg) of /bin/boa in firmware has buffer overflow vulnerability.
Parameter "submit_url" is read from HTTP request into $v0
$v0 is used as 2nd parameter in sub_40bddc at 0x44b578
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.