Palo Alto Networks Firewall Vulnerability Allows Attacker to Trigger DoS Attacks

Palo Alto Networks released patches for CVE-2026-0227, a denial-of-service vulnerability in PAN-OS that can force GlobalProtect gateways and portals into maintenance mode (CVSS v4.0 7.7). The flaw affects multiple PAN-OS branches (detailed affected/unaffected versions provided), has public proof-of-concept code and observed scanning activity, and requires prompt upgrading to vendor hotfixes because no workaround exists.