Firms, including Microsoft, say state-backed Chinese and Iranian hackers and rogue cryptocurrency miners have already seized on it. The flaw lets internet-based attackers easily seize control of everything, from industrial control systems to web servers and consumer electronics. The U.S. Department of Homeland Security has sounded a dire alarm, ordering federal agencies to urgently find and patch bug instances because its so easily exploitable and telling those with public-facing networks to put up firewalls if they cant be sure.
Source: https://jamaica-gleaner.com/article/business/20211217/security-flaw-freaked-out-internet