Authentication Bypass in Palo Alto Networks PAN-OS Software
CVE-2026-0257

4.7MEDIUM

Key Information:

Vendor

Palo Alto Networks
Status
Cloud Ngfw
Pan-os
Prisma Access
Vendor
CVE Published:
13 May 2026

Badges

👾 Exploit Exists

What is CVE-2026-0257?

The authentication bypass vulnerability in Palo Alto Networks' PAN-OS software presents a significant security risk by allowing unauthorized access to the GlobalProtect portal and gateway. This flaw enables attackers to circumvent authentication mechanisms, potentially gaining unauthorized VPN connections and compromising the integrity of network security. It is crucial for users of affected PAN-OS versions to apply necessary patches to mitigate this risk, as Panorama and Cloud NGFW products are not affected by these vulnerabilities.

Affected Version(s)

PAN-OS 12.1.0 < 12.1.7, 12.1.4-h6

PAN-OS 11.2.0 < 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17

PAN-OS 11.1.0 < 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33

References

https://security.paloaltonetworks.com/CVE-2026-0257
vendor-advisory

CVSS V4

Score:
4.7
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue.
.