I don't know where you got the idea that this got discovered accidentally by this one tech dude. Actually quite a bunch of people have been complaining online about this for months, then for some reason it blew up when the matter got the attention of the tech and sec communities.

see those for example: https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Persona... http://www.thestudentroom.co.uk/showthread.php?t=3013039 https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Lenovo-...