This will upset a lot of people
If Siglent block this hole it will upset a lot of people. These scopes are sold with a variety of bandwidths and features. The hardware is the same in each case. The backdoor is used by many as a means of hacking into the scope to obtain a free upgrade from a cheap entry-level version, although I believe Siglent have been trying to make that more difficult lately. Head over to the eevblog for more details.