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Palo Alto Networks PAN-OS 11.1.x / 11.2.x / 12.1.x Vulnerability

critical Nessus Plugin ID 314451

Synopsis

The remote PAN-OS host is affected by a vulnerability

Description

The version of Palo Alto Networks PAN-OS running on the remote host is a vulnerable version of 11.1.x, 11.2.x, or 12.1.x. It is, therefore, affected by a vulnerability.

 A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition.


 Panorama, Cloud NGFW, and Prisma Access are not impacted by these vulnerabilities.

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 a fixed version

See Also

https://security.paloaltonetworks.com/CVE-2026-0263

Plugin Details

Severity: Critical

ID: 314451

File Name: palo_alto_CVE-2026-0263.nasl

Version: 1.1

Type: Combined

Published: 5/13/2026

Updated: 5/13/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.7

Temporal Score: 7.2

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

CVSS Score Source: CVE-2026-0263

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/13/2026

Vulnerability Publication Date: 5/13/2026

Reference Information

CVE: CVE-2026-0263

CWE: 787