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Palo Alto Networks Releases Security Update for PAN-OS

Palo Alto Networks releases security update for PAN-OS to address a high severity vulnerability that could result in a denial-of-service condition

Threat ID:
CC-4737
Threat Severity:
Medium
Published:
16 January 2026 3:24 PM
Report a cyber attack: call 0300 303 5222 or email [email protected]

Summary

Palo Alto Networks releases security update for PAN-OS to address a high severity vulnerability that could result in a denial-of-service condition

Threat details

Introduction

Palo Alto has released a security update to address a high severity vulnerability in GlobalProtect Gateway and Portal in Palo Alto Networks PAN-OS software. Successful exploitation of this vulnerability could allow an unauthenticated attacker to cause a denial-of-service (DoS) condition to the firewall.

  • CVE-2026-0227 - Improper Check for Unusual or Exceptional Conditions vulnerability - CVSSv4 base score: 8.7.

Remediation advice

Affected organisations are encouraged to review Palo Alto's CVE-2026-0227 PAN-OS: Firewall Denial of Service (DoS) in GlobalProtect Gateway and Portal security advisory and apply the relevant update as soon as possible.

Definitive source of threat updates

Last edited: 16 January 2026 3:24 pm