[Zak]

It's a printer.

The only way it could have security issues is if it's connected directly to the internet (not behind NAT) or a device on my LAN is actively attacking it. The former case is difficult to accomplish without enough expertise to know better; the latter is plausible, but mitigated by a printer too simple to easily harbor a persistent threat.

[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.