I created a quick Youtube video to summarize the impact of the vulnerability. The tricky part is that there is a huge vulnerable population out there, but the impact is limited as in most cases, the vulnerability is not exposed.
Feel free to share the video or the slides. I am making PPT and PDF versions available below
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.