CVE-2026-0257

CriticalActively exploited (CISA KEV)Known to be used in ransomware campaigns

Description

Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Palo Alto Networks PAN-OS

PublishedMay 13, 2026

First seenMay 13, 2026

Added to KEVMay 29, 2026

Weakness typeCWE-565CWE-565

How to fix

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date: Jun 1, 2026

Update

paloaltonetworks pan-os10.2.7 or later

Vendor advisories

security.paloaltonetworks.com/CVE-2026-0257

Affected products

Product	Affected versions	Fixed in
paloaltonetworks pan-os	v < 10.2.7, 10.2.7, 10.2.8, 10.2.9, 10.2.10, 10.2.11, 10.2.12, 10.2.13, 10.2.14, 10.2.15, 10.2.16, 10.2.17, 10.2.18, 11.1.0, 11.1.1, 11.1.2, 11.1.3, 11.1.4, 11.1.5, 11.1.6, 11.1.7, 11.1.8, 11.1.9, 11.1.10, 11.1.11, 11.1.12, 11.1.13, 11.1.14, 11.2.0, 11.2.1, 11.2.2, 11.2.3, 11.2.4, 11.2.5, 11.2.6, 11.2.7, 11.2.8, 11.2.9, 11.2.10, 11.2.11, 12.1.2, 12.1.3, 12.1.4, 12.1.5, 12.1.6	10.2.7
paloaltonetworks prisma_access	No range specified	—
siemens ruggedcom_ape1808_firmware	No range specified	—

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