A computer is a computer is a computer, and by any other name still subject to the same smell. (apologies to Will.)
I am not familiar with the appliance you have but do work at a Health Science Center. We have had recurring problems with embedded systems. Heart rate monitors, ventilators with Windows 2k as the underlying operating system and a dedicated program to run the functions the machine is designed for. Now that everything has an IP address and is connected for record keeping and remote monitoring, they are all at risk. We have dealt with several hundred systems that were subject to the ‘Upnp’ attack. You can not directly patch the operating system without breaking the dedicated program that is the reason you bought the equipment in the first place. Being a product of McAfee is not iron clad protection, remember eOrchesta for group management of anti-virus had a blank password on the SA account for the underlying MSDE database. Blaster ate a lot of core systems when people said were safe because of their role.
Determine the underlying operating system, make sure it is patched on a regular basis. The truth is that anything attached to the internet WILL be attacked.