https://www.bleepingcomputer.com/news/security/palo-alto-networks-patches-critical-vulnerability-in-firewall-os/ > Palo Alto Networks disclosed a critical vulnerability found in the operating system (PAN-OS) of all its next-generation firewalls that could allow unauthenticated network-based attackers to bypass authentication. > According to the company's website, PAN‑OS is the software that powers all of its next-generation firewalls.