May 29, 2026 · Applied Cybernetics Group
CVE-2026-0257 — Palo Alto Networks PAN-OS
Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
- Added to KEV
2026-05-29- Federal due date
2026-06-01- Vendor
- Palo Alto Networks
- Product
- PAN-OS
- EPSS
- 98.0th percentile (score 0.528, as of
2026-06-08) - NVD CVSS v3.1
- 9.1 (CRITICAL)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-0257
CISA short description
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
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.
NVD 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.