Palo Alto Networks addressed a critical vulnerability (CVE-2026-0227) that could enable attackers to cause a denial-of-service attack by disabling firewalls. Although most affected systems have been patched, the vulnerability highlights ongoing risks faced by organizations using PAN-OS and GlobalProtect. #CVE-2026-0227 #GlobalProtect
Keypoints
- Palo Alto Networks released patches for a high-severity DoS vulnerability in PAN-OS and Prisma Access.
- The vulnerability affects firewalls running PAN-OS 10.1 and later, impacting the GlobalProtect gateway or portal.
- Most cloud Prisma Access instances have already been upgraded, with remaining updates scheduled.
- Exposed firewalls are tracked by Shadowserver, though the extent of vulnerable systems is unclear.
- Previous exploits and zero-day attacks on Palo Alto firewalls demonstrate persistent threats in the cybersecurity landscape.