Make a hole in the air
I am pleasantly surprised that someone took the time and effort to probe a consumer device for security holes.
I am pretty sure that the vast majority of devices known in existence have holes in them, somehow, but so few of them have been found out.
Built in 'forgotten' backdoors with root-access? Buffer overflow vulnerabilities? Unencrypted communications over networks? The list goes on and on.
I am not sure how much it matters though, as the average john-doe will still be pretty safe even with devices with holes in em. I can't possibly imagine my neighbor trying to hack my printer to gain access, it seems the stuff movies are made of.
Having said that, I'm pretty sure intelligence agencies are happily making a list of how to compromise your fridge though :)