https://techcrunch.com/2019/01/30/cheap-internet-of-things-gadgets-betray-you-even-after-you-toss-them-in-the-trash/
You may think that the worst you’ll risk by buying a bargain-bin smart bulb or security camera will be a bit of extra trouble setting it up or a lack of settings. When plugged in many of those cheap gadgets are a security risk. But even when they are thrown to the garbage can, they can still compromise your network.

The issue is what they keep onboard their tiny brains, and how.

Here is links to reports:

DON’T TOSS THAT BULB, IT KNOWS YOUR PASSWORD

https://hackaday.com/2019/01/29/dont-toss-that-bulb-it-knows-your-password/

Pwn the LIFX Mini white

https://limitedresults.com/2019/01/pwn-the-lifx-mini-white/

The Problem with Throwing Away a Smart Device…

https://blog.hackster.io/the-problem-with-throwing-away-a-smart-device-75c8b35ee3c7

…is that sometimes they aren’t that smart about security.