My antivirus is kvrt, I run it on-demand when I want to check, and it is blocked by my firewall. I suppose in theory it could contain something that exploits a

My antivirus is kvrt, I run it on-demand when I want to check, and it is blocked by my firewall. I suppose in theory it could contain something that exploits an ability to sidestep the firewall, but then you're in to conspiracy theory land.