All you need to do is successfully hack into it's systems.
This is great for Tesla - they're the only automaker who's willing to step up and work with the world's hackers to improve their security. Everyone else has their heads firmly buried in their backsides, spouting aphorisms about how security is so important to them but not willing to put their money where their mouth is. It's like Equifax stating "We pride ourselves on being a leader in managing and protecting data" after handing 150 million people's credit information over to hackers.
I fully expect there to be several hacks demonstrated - and certain press outlets screaming about how insecure a Tesla is. It's nearly impossible to secure a computer system the size that today's systems are - but incentivizing those with the capability to exploit security seems to be the best way to go about it these days.
Now, if one of the hackers would simply hack in a usable USB Flash drive music player, I'd contribute to the payout...