Yeah, we have a thread about Kaspersky,
which includes a link to this article,
which includes this nifty excerpt:
The N.S.A. bans its analysts from using Kaspersky antivirus at the agency, in large part because the agency has exploited antivirus software for its own foreign hacking operations and knows the same technique is used by its adversaries.
“Antivirus is the ultimate back door,” Blake Darché, a former N.S.A. operator and co-founder of Area 1 Security. “It provides consistent, reliable and remote access that can be used for any purpose, from launching a destructive attack to conducting espionage on thousands or even millions of users.”
So Kaspersky made the headlines, but the NSA apparently does the same thing with other AV companies. And it could be happening in other countries as well. I still trust the AV software to protect my games, my prog metal collection, and my episodes of Rick and Morty, but I wouldn’t store top-secret documents on the same PC.