> Reviewing port 7547 scans with port 443 open results in the exclusive receipt of Zyxel SSL certificates.
depth=0 C = CN, ST = TAIWAN, L = XINZHU, O = ZyXEL, OU = DSL Unit, CN = ZyXEL, emailAddress = support@zyxel.com
It appears they make the vulnerable routers but that they are likely sold under different brands, or distributed by ISPs using their brand.