In what appears to be a bizarre mix-up
Just to be clear, the unwelcome software is most definitely an official Samsung ROM, and while the devices are in any danger, it could present some incompatibility issues. For a company of Samsung’s size and reach, this mess certainly raises some very pertinent questions.
Either way, just make sure to check for the software version before updating your device in case your official Samsung desktop client notifies you about a new software. The old Samsung ROM, while not malicious in itself, will certainly not come with the latest security patches, leaving your device potentially vulnerable to all the recent exploits, including, but not limited to, the much talked-about Meltdown and Spectre security flaws.