The TCP/IP stack in that NetBSD toaster is >= as secure as your laptop/desktop.
Re:HTTP Status 418 I'm a teapot
by JonnieCache on Tuesday February 15, 2011 @03:36PM
(#2223164)
The hypothetical Hot Beverages As A Service device that exists only in my head doesn't use NetBSD, it uses a custom standalone stack running on a PIC/AVR. So there.
I would like to take this opportunity to direct your attention towards the venerable http://nicecupofteaandasitdown.com which is both splendid and written by a hacker. I think you can tell when you get to the page with the venn diagram of biscuits.