https://wccftech.com/thunderbolt-security-flaw-in-intel-chips-affects-all-compatible-macs-and-pcs/

Newly reported security flaws in Intel's Thunderbolt 3 chips which affect all Macs that were released between 2011-2020 with compatible ports, as well as Windows and Linux PCs. The flaws can give an attacker complete access to a machine, even if it locked or encrypted, as it can bypass Secure Boot, BIOS, operating system, and disk encryption.

The flaws have been detailed in a report by security researcher Björn Ruytenberg. The report details 7 disclosed vulnerabilities that affect Thunderbolt 3 security: