CVE-2026-0257: PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities (Severity: HIGH)

Published May 13, 2026
·
Updated

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.

Other sources

Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.

— CISA

Affected Software

196 affected componentsFixes available
Palo Alto Networks PAN-OS (GlobalProtect)
Palo Alto Networks PAN-OS
Palo Alto Networks Cloud NGFW
Palo Alto Networks PAN-OS=12.1.0, =11.2.0, =11.1.0, =10.2.0
12.1.712.1.4-h611.2.1211.2.10-h711.2.7-h1411.2.4-h1711.1.1511.1.13-h511.1.10-h2511.1.7-h611.1.6-h3211.1.4-h3310.2.18-h610.2.16-h710.2.13-h2110.2.10-h3610.2.7-h34
Palo Alto Networks Prisma Access<10.2.10-h36, =10.2.0, <11.2.7-h13, =11.2.0
10.2.10-h3611.2.7-h13
Palo Alto Networks PAN-OS<10.2.7
Palo Alto Networks PAN-OS=10.2.7
Palo Alto Networks PAN-OS=10.2.7-h1
Palo Alto Networks PAN-OS=10.2.7-h12
Palo Alto Networks PAN-OS=10.2.7-h16
Palo Alto Networks PAN-OS=10.2.7-h18
Palo Alto Networks PAN-OS=10.2.7-h19
Palo Alto Networks PAN-OS=10.2.7-h21
Palo Alto Networks PAN-OS=10.2.7-h24
Palo Alto Networks PAN-OS=10.2.7-h3
Palo Alto Networks PAN-OS=10.2.7-h32
Palo Alto Networks PAN-OS=10.2.7-h6
Palo Alto Networks PAN-OS=10.2.7-h8
Palo Alto Networks PAN-OS=10.2.8
Palo Alto Networks PAN-OS=10.2.9
Palo Alto Networks PAN-OS=10.2.10
Palo Alto Networks PAN-OS=10.2.10-h10
Palo Alto Networks PAN-OS=10.2.10-h12
Palo Alto Networks PAN-OS=10.2.10-h14
Palo Alto Networks PAN-OS=10.2.10-h17
Palo Alto Networks PAN-OS=10.2.10-h18
Palo Alto Networks PAN-OS=10.2.10-h2
Palo Alto Networks PAN-OS=10.2.10-h21
Palo Alto Networks PAN-OS=10.2.10-h27
Palo Alto Networks PAN-OS=10.2.10-h3
Palo Alto Networks PAN-OS=10.2.10-h30
Palo Alto Networks PAN-OS=10.2.10-h31
Palo Alto Networks PAN-OS=10.2.10-h4
Palo Alto Networks PAN-OS=10.2.10-h5
Palo Alto Networks PAN-OS=10.2.10-h7
Palo Alto Networks PAN-OS=10.2.10-h9
Palo Alto Networks PAN-OS=10.2.11
Palo Alto Networks PAN-OS=10.2.12
Palo Alto Networks PAN-OS=10.2.13
Palo Alto Networks PAN-OS=10.2.13-h1
Palo Alto Networks PAN-OS=10.2.13-h10
Palo Alto Networks PAN-OS=10.2.13-h16
Palo Alto Networks PAN-OS=10.2.13-h18
Palo Alto Networks PAN-OS=10.2.13-h2
Palo Alto Networks PAN-OS=10.2.13-h3
Palo Alto Networks PAN-OS=10.2.13-h4
Palo Alto Networks PAN-OS=10.2.13-h5
Palo Alto Networks PAN-OS=10.2.13-h7
Palo Alto Networks PAN-OS=10.2.14
Palo Alto Networks PAN-OS=10.2.15
Palo Alto Networks PAN-OS=10.2.16
Palo Alto Networks PAN-OS=10.2.16-h1
Palo Alto Networks PAN-OS=10.2.16-h4
Palo Alto Networks PAN-OS=10.2.16-h6
Palo Alto Networks PAN-OS=10.2.17
Palo Alto Networks PAN-OS=10.2.18
Palo Alto Networks PAN-OS=10.2.18-h1
Palo Alto Networks PAN-OS=10.2.18-h5
Palo Alto Networks PAN-OS=11.1.0
Palo Alto Networks PAN-OS=11.1.1
Palo Alto Networks PAN-OS=11.1.2
Palo Alto Networks PAN-OS=11.1.3
Palo Alto Networks PAN-OS=11.1.4
Palo Alto Networks PAN-OS=11.1.4-h1
Palo Alto Networks PAN-OS=11.1.4-h13
Palo Alto Networks PAN-OS=11.1.4-h15
Palo Alto Networks PAN-OS=11.1.4-h16
Palo Alto Networks PAN-OS=11.1.4-h17
Palo Alto Networks PAN-OS=11.1.4-h18
Palo Alto Networks PAN-OS=11.1.4-h25
Palo Alto Networks PAN-OS=11.1.4-h27
Palo Alto Networks PAN-OS=11.1.4-h32
Palo Alto Networks PAN-OS=11.1.4-h4
Palo Alto Networks PAN-OS=11.1.4-h7
Palo Alto Networks PAN-OS=11.1.4-h9
Palo Alto Networks PAN-OS=11.1.5
Palo Alto Networks PAN-OS=11.1.6
Palo Alto Networks PAN-OS=11.1.6-h1
Palo Alto Networks PAN-OS=11.1.6-h10
Palo Alto Networks PAN-OS=11.1.6-h14
Palo Alto Networks PAN-OS=11.1.6-h17
Palo Alto Networks PAN-OS=11.1.6-h19
Palo Alto Networks PAN-OS=11.1.6-h2
Palo Alto Networks PAN-OS=11.1.6-h20
Palo Alto Networks PAN-OS=11.1.6-h21
Palo Alto Networks PAN-OS=11.1.6-h22
Palo Alto Networks PAN-OS=11.1.6-h23
Palo Alto Networks PAN-OS=11.1.6-h25
Palo Alto Networks PAN-OS=11.1.6-h29
Palo Alto Networks PAN-OS=11.1.6-h3
Palo Alto Networks PAN-OS=11.1.6-h4
Palo Alto Networks PAN-OS=11.1.6-h5
Palo Alto Networks PAN-OS=11.1.6-h6
Palo Alto Networks PAN-OS=11.1.6-h7
Palo Alto Networks PAN-OS=11.1.7
Palo Alto Networks PAN-OS=11.1.7-h1
Palo Alto Networks PAN-OS=11.1.7-h2
Palo Alto Networks PAN-OS=11.1.7-h4
Palo Alto Networks PAN-OS=11.1.8
Palo Alto Networks PAN-OS=11.1.9
Palo Alto Networks PAN-OS=11.1.10
Palo Alto Networks PAN-OS=11.1.10-h1
Palo Alto Networks PAN-OS=11.1.10-h10
Palo Alto Networks PAN-OS=11.1.10-h12
Palo Alto Networks PAN-OS=11.1.10-h21
Palo Alto Networks PAN-OS=11.1.10-h4
Palo Alto Networks PAN-OS=11.1.10-h5
Palo Alto Networks PAN-OS=11.1.10-h7
Palo Alto Networks PAN-OS=11.1.10-h9
Palo Alto Networks PAN-OS=11.1.11
Palo Alto Networks PAN-OS=11.1.12
Palo Alto Networks PAN-OS=11.1.13
Palo Alto Networks PAN-OS=11.1.13-h1
Palo Alto Networks PAN-OS=11.1.13-h2
Palo Alto Networks PAN-OS=11.1.13-h3
Palo Alto Networks PAN-OS=11.1.14
Palo Alto Networks PAN-OS=11.2.0
Palo Alto Networks PAN-OS=11.2.1
Palo Alto Networks PAN-OS=11.2.2
Palo Alto Networks PAN-OS=11.2.3
Palo Alto Networks PAN-OS=11.2.4
Palo Alto Networks PAN-OS=11.2.4-h1
Palo Alto Networks PAN-OS=11.2.4-h10
Palo Alto Networks PAN-OS=11.2.4-h11
Palo Alto Networks PAN-OS=11.2.4-h12
Palo Alto Networks PAN-OS=11.2.4-h14
Palo Alto Networks PAN-OS=11.2.4-h15
Palo Alto Networks PAN-OS=11.2.4-h2
Palo Alto Networks PAN-OS=11.2.4-h4
Palo Alto Networks PAN-OS=11.2.4-h5
Palo Alto Networks PAN-OS=11.2.4-h6
Palo Alto Networks PAN-OS=11.2.4-h7
Palo Alto Networks PAN-OS=11.2.4-h8
Palo Alto Networks PAN-OS=11.2.4-h9
Palo Alto Networks PAN-OS=11.2.5
Palo Alto Networks PAN-OS=11.2.6
Palo Alto Networks PAN-OS=11.2.7
Palo Alto Networks PAN-OS=11.2.7-h1
Palo Alto Networks PAN-OS=11.2.7-h10
Palo Alto Networks PAN-OS=11.2.7-h11
Palo Alto Networks PAN-OS=11.2.7-h12
Palo Alto Networks PAN-OS=11.2.7-h13
Palo Alto Networks PAN-OS=11.2.7-h2
Palo Alto Networks PAN-OS=11.2.7-h3
Palo Alto Networks PAN-OS=11.2.7-h4
Palo Alto Networks PAN-OS=11.2.7-h7
Palo Alto Networks PAN-OS=11.2.7-h8
Palo Alto Networks PAN-OS=11.2.8
Palo Alto Networks PAN-OS=11.2.9
Palo Alto Networks PAN-OS=11.2.10
Palo Alto Networks PAN-OS=11.2.10-h1
Palo Alto Networks PAN-OS=11.2.10-h2
Palo Alto Networks PAN-OS=11.2.10-h3
Palo Alto Networks PAN-OS=11.2.10-h4
Palo Alto Networks PAN-OS=11.2.10-h5
Palo Alto Networks PAN-OS=11.2.10-h6
Palo Alto Networks PAN-OS=11.2.11
Palo Alto Networks PAN-OS=12.1.2
Palo Alto Networks PAN-OS=12.1.3
Palo Alto Networks PAN-OS=12.1.4
Palo Alto Networks PAN-OS=12.1.4-h2
Palo Alto Networks PAN-OS=12.1.4-h3
Palo Alto Networks PAN-OS=12.1.4-h5
Palo Alto Networks PAN-OS=12.1.5
Palo Alto Networks PAN-OS=12.1.6
All of the following
Palo Alto Networks Prisma Access
Any of the following
Palo Alto Networks PAN-OS>=10.2.0<10.2.10
Palo Alto Networks PAN-OS>=11.2.0<11.2.7
Palo Alto Networks PAN-OS=10.2.10
Palo Alto Networks PAN-OS=10.2.10-h10
Palo Alto Networks PAN-OS=10.2.10-h12
Palo Alto Networks PAN-OS=10.2.10-h14
Palo Alto Networks PAN-OS=10.2.10-h17
Palo Alto Networks PAN-OS=10.2.10-h18
Palo Alto Networks PAN-OS=10.2.10-h2
Palo Alto Networks PAN-OS=10.2.10-h21
Palo Alto Networks PAN-OS=10.2.10-h27
Palo Alto Networks PAN-OS=10.2.10-h3
Palo Alto Networks PAN-OS=10.2.10-h30
Palo Alto Networks PAN-OS=10.2.10-h31
Palo Alto Networks PAN-OS=10.2.10-h4
Palo Alto Networks PAN-OS=10.2.10-h5
Palo Alto Networks PAN-OS=10.2.10-h7
Palo Alto Networks PAN-OS=10.2.10-h9
Palo Alto Networks PAN-OS=11.2.7
Palo Alto Networks PAN-OS=11.2.7-h1
Palo Alto Networks PAN-OS=11.2.7-h10
Palo Alto Networks PAN-OS=11.2.7-h11
Palo Alto Networks PAN-OS=11.2.7-h12
Palo Alto Networks PAN-OS=11.2.7-h2
Palo Alto Networks PAN-OS=11.2.7-h3
Palo Alto Networks PAN-OS=11.2.7-h4
Palo Alto Networks PAN-OS=11.2.7-h7
Palo Alto Networks PAN-OS=11.2.7-h8
All of the following
Siemens Ruggedcom Ape1808 Firmware
Siemens Ruggedcom Ape1808

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.1.7Fixed in 12.1.4-h6Fixed in 11.2.12Fixed in 11.2.10-h7Fixed in 11.2.7-h14Fixed in 11.2.4-h17Fixed in 11.1.15Fixed in 11.1.13-h5Fixed in 11.1.10-h25Fixed in 11.1.7-h6Fixed in 11.1.6-h32Fixed in 11.1.4-h33Fixed in 10.2.18-h6Fixed in 10.2.16-h7Fixed in 10.2.13-h21Fixed in 10.2.10-h36Fixed in 10.2.7-h34
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.2.10-h36Fixed in 11.2.7-h13
  3. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.7-h34
  4. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.18-h6
  5. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.13-h21
  6. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.16-h7
  7. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.10-h36
  8. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.4-h33
  9. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.15
  10. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.13-h5
  11. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.6-h32
  12. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.7-h6
  13. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.1.10-h25
  14. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.2.4-h17
  15. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.2.12
  16. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.2.7-h14
  17. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 11.2.10-h7
  18. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 12.1.4-h6
  19. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 12.1.7
  20. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 10.2.18
  21. Upgrade

    Upgrade Palo Alto Networks PAN-OS (GlobalProtect portal/gateway) to a version that resolves this vulnerability.

    Fixed in 12.1.5
  22. Configuration

    In the GlobalProtect portal and gateway configuration, disable the “Authentication Override” options used for generating and accepting cookies by unchecking them.

    GlobalProtect portal and gateway (PAN-OS) Authentication Override options (generating and accepting cookies) = Unchecked/disabled
  23. Configuration

    Use a dedicated certificate exclusively for Authentication Override cookies; generate a new certificate for authentication override cookies and store it securely, and do not reuse/share it with other features or users.

    GlobalProtect authentication override cookies (certificate) Certificate reuse/sharing = Do not reuse / do not share
  24. Compensating control

    Do not reuse the portal/gateway authentication override cookie certificate and do not share it with other features or users; after upgrade, the firewall will regenerate the authentication override cookie using a more secure method.

  25. Operational

    After upgrading PAN-OS, require GP users to re-authenticate once (one-time requirement), even if an authentication override cookie is present.

Event History

May 13, 2026
Advisory Published
via Palo Alto Networks·04:00 PM
Known Exploited
via Palo Alto Networks·04:00 PM
Data Sourced
via Palo Alto Networks·04:00 PM
RemedyDescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·06:15 PM
Data Sourced
via MITRE·06:15 PM
RemedyDescriptionWeakness
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeaknessAffected Software
May 29, 2026
Known Ransomware
via CISA·12:00 AM
Data Sourced
via CISA·12:00 AM
RemedyDescriptionAffected Software
May 30, 2026
News Published
via BleepingComputer·06:02 PM
News Published
via BleepingComputer·06:05 PM
Jun 1, 2026
News Published
via Dark Reading·02:35 PM
News Published
via Dark Reading·03:04 PM
Jun 3, 2026
Advisory Published
via Palo Alto Networks·05:45 AM
Jul 1, 2026
News Published
via BleepingComputer·08:08 PM
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Frequently Asked Questions

1

What is the severity of CVE-2026-0257?

CVE-2026-0257 has been classified with a severity level of MEDIUM.

2

What does CVE-2026-0257 exploit?

CVE-2026-0257 exploits authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS software.

3

How do I fix CVE-2026-0257?

Fixing CVE-2026-0257 involves upgrading to the latest version of PAN-OS provided by Palo Alto Networks.

4

Who is affected by CVE-2026-0257?

CVE-2026-0257 affects users of Palo Alto Networks PAN-OS with GlobalProtect functionality.

5

What can attackers achieve with CVE-2026-0257?

Attackers can establish unauthorized VPN connections by exploiting the vulnerabilities outlined in CVE-2026-0257.

Company

Resources

Contact

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