Detections
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Palo Alto Networks PAN-OS GlobalProtect Gateway/Portal DoS (CVE-2026-0227)

high Nessus Plugin ID 290249

Synopsis

The remote PAN-OS host is affected by a vulnerability

Description

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.

This issue is applicable only to PAN-OS NGFW configurations with an enabled GlobalProtect gateway or portal.

Tenable has extracted the preceding description block directly from the PAN-OS security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed PAN-OS version referenced in the vendor advisory.

See Also

https://security.paloaltonetworks.com/CVE-2026-0227

Plugin Details

Severity: High

ID: 290249

File Name: palo_alto_CVE-2026-0227.nasl

Version: 1.1

Type: combined

Published: 1/16/2026

Updated: 1/16/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-0227

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/o:paloaltonetworks:pan-os

Required KB Items: Host/Palo_Alto/Firewall/Version, Host/Palo_Alto/Firewall/Full_Version, Host/Palo_Alto/Firewall/Source, Settings/ParanoidReport

Patch Publication Date: 1/14/2026

Vulnerability Publication Date: 1/14/2026

Reference Information

CVE: CVE-2026-0227

IAVA: 2026-A-0057