I don't think their MQTT was over TLS traditionally (maybe they added this), it used to be that you just sent a message over unauthenticated MQTT and FTP'd your 3MF; the FTP had a password but that also was sent in the clear. https://github.com/darkorb/bambu-ftp-and-print
Most corps these don't want to deal with the hassle of VLANs and black holes for insecure devices.
Most corps these don't want to deal with the hassle of VLANs and black holes for insecure devices.