CVE DATABASE / CVE-2026-0257

CVE-2026-0257

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

CVSS 9.1 · CRITICAL ⚠ CISA KEV — ACTIVELY EXPLOITED

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2026-05-29. Federal remediation due 2026-06-01.
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.

Summary

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.

CVSS 3.1 breakdown

Base score	9.1 (CRITICAL)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector	NETWORK
Attack complexity	LOW
Privileges required	NONE
User interaction	NONE
Scope	UNCHANGED
Confidentiality	HIGH
Integrity	HIGH
Availability	NONE

Weakness type (CWE)

CWE-565

Affected products

Paloaltonetworks pan-osPaloaltonetworks prisma access

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References

Data: NIST NVD + CISA KEV. NVD last modified 2026-05-29. Always verify against the vendor advisory before acting.