https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00075&languageid=en-fr
via
https://www.theregister.co.uk/2017/05/01/intel_amt_me_vulnerability/
and
http://www.theregister.co.uk/2017/05/05/intel_amt_remote_exploit/

A blunder in the vPro/AMT ME firmware's authentication code allows for the password checks to be bypassed, serving up total access to a vulnerable machine's hardware. As the flaw is in the AMT toolkit, it affects mostly enterprise kit, not home PCs.