Earlier this year, news broke that a malware strain named VPNFilter was infecting hundreds of thousands of devices. If you didn’t act then, now’s the time. Security experts have updated their threat assessment and its much worse than they originally thought.

A destructive, new malware has surfaced in at least 500,000 home and business routers across 54 countries. Security researchers warned that the infected devices could “self-destruct” as the said malware named VPNFilter can maintain presence even after a successful reboot.