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CVE-2026-0257

9.1
CRITICALCVSS v3.1 Base Score
41.50%
MEDIUM RiskEPSS (97th percentile)
KEV

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.

Published: 5/13/2026
Modified: 5/29/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

Vendor / Product:

Palo Alto Networks PAN-OS

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.

Due Date: 6/1/2026(OVERDUE)
Added to KEV:

5/29/2026

Notes:

https://security.paloaltonetworks.com/CVE-2026-0257 ; https://nvd.nist.gov/vuln/detail/CVE-2026-0257

Vulnerability Summary

CVSS v3 Score

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Score (Exploitation Probability)

41.50%MEDIUM Exploitation Risk
97th percentile

This vulnerability has a 41.50% probability of being exploited in the next 30 days, ranking higher than 97% of all scored CVEs.

CWE Classification

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