An estimated 30 million Dell computers are affected by several vulnerabilities that may enable an attacker to remotely execute code in the pre-boot (BIOS/UEFI) environment. The problem resides in the BIOSConnect feature of Dell SupportAssist, a solution that comes preinstalled on most Windows-based Dell machines and helps users troubleshoot and resolve hardware and software problems. The vulnerabilities affect 128 Dell models of consumer and business laptops, desktops, and tablets, including devices protected by Secure Boot and Secure-core PCs.
Source: https://www.helpnetsecurity.com/2021/06/24/vulnerabilities-dell-bios/