Outdated browsers and browser plugins. People use them, forget about them, they become outdated, and their machine gets compromised. It’s a story almost as old as the web browser. The problem is, people never learn and never update - or, in this case, get rid of the problematic plugin.
ActiveX, a framework native to Internet Explorer, was introduced in 1996. Still supported in Windows 10, it allows an attacker to steal data and fully take over the victim’s machine when that person visits a page that contains a particular set of scripts.
How relevant is this exploit in 2019? In an unscientific survey among software engineers about ActiveX and if it still played a role, we got answers like this, from Zachary S. in San Francisco: "I think it’s dead. I hope it’s dead. It should be killed if it’s not dead."
Unfortunately, it’s not. According to NetMarketShare ("Market share statistics for Internet