Incorrect access control in the config.xgi function of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to download the configuration file via providing a crafted web request.
https://www.dlink.com/en/security-bulletin/
https://gist.github.com/stevenyu113228/1fc5dcc63e4b4e9f5523167be11abf17