A collection of five flaws, collectively tracked as CVE-2021-21551, have been discovered in DBUtil, a driver from that Dell machines install and load during the BIOS update process and is unloaded at the next reboot. The vulnerability is not considered critical because an attacker exploiting it needs to have compromised the computer beforehand. The remedy is a fixed driver but the researcher says that at the moment of writing the report the company had not revoked the certificate for the vulnerable driver, meaning an adversary on the network can still use it in an attack.
Source: https://www.bleepingcomputer.com/news/security/vulnerable-dell-driver-puts-hundreds-of-millions-of-systems-at-risk/