Infiltrating the network using a malicious ZigBee lightbulb
research.checkpoint.com
research.checkpoint.com
What's more impressive though is the disclosure timeline, unless I'm missing something Signify / Philips acknowledged + confirmed the issue on the same day they were disclosed, and then fixed them 20 days later. The only thing I'm not impressed with is the time that it took from their fix to be released as a software update (49 days).
I know that compared to other vendors, this timeline is really great, but I'm still impressed it takes that much of a time to release a fix they implemented and tested as part of a software update