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Tesla hacked again, 24 more zero-days exploited at Pwn2Own Tokyo
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
Car companies out source to 3rd parties for their car apps. And these 3rd parties just pump things out on aggressive deadlines. A couple former coworkers work(ed?) at one.
Edit - although, given the amount of in house tech at tesla, I'd expect them to mostly do their own software