ReVault bugs can be used to hijack more than 100 Dell laptop models
They can be exploited via a Windows API and don't require elevated privileges

ReVault! When your SoC turns against you…
Talos reported 5 vulnerabilities to Broadcom and Dell affecting both the ControlVault3 Firmware and its associated Windows APIs that we are calling “ReVault”.

Cisco Talos Blog (blog.talosintelligence.com)