Palo Alto Networks patched a high-severity vulnerability that could allow unauthenticated attackers to disable firewall protections in denial-of-service (DoS) attacks. Tracked as CVE-2026-0227, this security flaw affects next-generation firewalls (running PAN-OS 10.1 or later) and Palo Alto Networks' Prisma Access configurations when the GlobalProtect gateway or portal is enabled. The cybersecurity company says that most cloud-based Prisma Access instances have already been patched, with those left to be secured already scheduled for an upgrade. "A vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to cause a denial of service (DoS) to the firewall. Repeated attempts to trigger this issue results in the firewall entering into maintenance mode," Palo…