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Not having a way to clearly understand what VLAN the device is communicating on is a terrible security flaw... essentially then anyone on the untrusted VLAN simply has to guess one password and then is able to completely reroute any traffic by retagging ports and changing membership.
In addition, the device appears to be sending out DHCP requests on all VLANs, so it is receiving IPs from random VLANs as well, so impossible to manage from the trusted network.
As an aside, I also have Smart Managed Pro switch, much more expensive and many more features. This is the ONLY feature that needs to be added to make this is a "basic" managed switch. (Keep in mind this is a 10gbe product as well).
Without this, however, there is a clear security issue since the only thing protecting the network is a single password.