[account42]

Theoretically there may be an exploit via data in the print jobs sent to the printer.

[Zak]

Sure, and that could break the printer, cause it to print things I don't want it to, or cause it to serve malware to other devices. I would like the printer to be too simple for the third case to be realistic, but that may be harder to build today than something with a more complex embedded OS.

[account42]

I guess it may be possible that a printer exploit could be used to then exploit devices using it to print but yeah that's probably stretching it.