https://www.cnet.com/news/ios-12-can-prevent-iphone-hacking-and-valves-playing-nice-with-apple/

If you know what you're doing (aka are either a hacker or part of law enforcement), you can apparently crack an iPhone's passcode using the USB port.

With iOS 12, Apple puts this flaw to the test with a new option that will disable USB accessories -- it's called the USB Restricted Mode. Now stick with me for this part. If you haven't unlocked your iPhone in the past hour, anyone who tries to grab any data from your iPhone through the iPhone's Lightning port gets DE-nied.