Varney asked McAfee to show how he thinks the Sony hackers were able to break into the company's computer systems and got an up-close and personal lesson.
From a remote location, McAfee hacked into Varney's phone via its voicemail, accessed the contacts and then faked a call from one of those contacts. When Varney's phone rang, it appeared to be an incoming call from Fox News headquarters.
Then, McAfee explained what he would do from there. Check out the clip above to see how it unfolded.
McAfee founded the software company that bears his name, but resigned from it in 1994. It's now a subsidiary of Intel.
(h/t Kevin Mitnick)
BEFORE YOU GO
How to vote
Vote-by-mail ballot request deadline: Varies by state
For the Nov 3 election: States are making it easier for citizens to vote absentee by mail this year due to the coronavirus. Each state has its own rules for mail-in absentee voting. Visit your state election office website to find out if you can vote by mail.Get more information
In-person early voting dates: Varies by state
Sometimes circumstances make it hard or impossible for you to vote on Election Day. But your state may let you vote during a designated early voting period. You don't need an excuse to vote early. Visit your state election office website to find out whether they offer early voting.My Election Office
General Election: Nov 3, 2020
Polling hours on Election Day: Varies by state/localityMy Polling Place