Thunderbolt has a flaw where someone can come along and access your information without passwords. This affects USB-C and DisplayPort as well. The bad guy has to have physical access to your computer, and it’s possible you may not need to worry. This link will take you to a place to check.

If you have a computer with Thunderbolt ports, you may be at risk of a serious firmware flaw known as “Thunderspy.” The vulnerability, which was discovered by security researcher Björn Ruytenberg, affects all Thunderbolt ports and USB-C or DisplayPort ports that support Thunderbolt cables. It gives a hacker full access to everything on your computer, even if it’s stored on encrypted hardware. Not only can someone steal all your data in a manner of minutes—an executed Thunderspy attack is also untraceable. You’d never even know the hack took place.

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