Flash is, and has been, a major, if not the biggest vector of attack in browsers since its inception. It has since its birth in the pits of hell been an ill-bred monstrosity, a cancer. It should have been euthanised long ago.
Companies that still use it for their ****ing "presence on the web" deserve to die the horrordeath of Doom.
These are not pesky little factoids you should leave out when you give an answer like that.