Today US-CERT issued a warning about Lenovo’s LSE:
Lenovo Service Engine (LSE) BIOS Vulnerability
Certain Lenovo personal computers contain a vulnerability in LSE (a Lenovo BIOS feature). Exploitation of this vulnerability may allow a remote attacker to take control of an affected system. Users and administrators are encouraged to review the Lenovo Security Advisories for notebooks and desktops and apply the necessary updates and mitigations.