A few days ago, Paul English of PreOS Security wrote a blog post giving an brief overview of the recent Intel AMT vulnerability.
[Note: We’re going to try and post a blog entry for major firmware vulnerabilities that impact enterprises, and the recent Intel AMT vulnerability seems like a good place to start.]
http://preossec.com/blog/2017/06/17/intel-amt-cve/
[Disclaimer: I work with Paul, at PreOS Security.]