# CVE-2026-0257

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.

- Page: https://www.vulneraibility.com/cve/CVE-2026-0257
- CVSS: 9.1
- Known exploited: yes, in CISA KEV since 2026-05-29; CISA due date 2026-06-01; known ransomware use
- EPSS: 95.64%
- Unvetted proof-of-concept code on GitHub: 7 GitHub proofs of concept · 1 Nuclei template (first 2026-05-29)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2026-05-28)
- Weakness: CWE-565
- Published: 2026-05-13

## Affected versions

- Palo Alto Networks PAN-OS: affected >= 12.1.0 and < 12.1.7, 12.1.4-h6; >= 11.2.0 and < 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17; >= 11.1.0 and < 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33; >= 10.2.0 and < 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34
- Palo Alto Networks Prisma Access: affected >= 10.2.0 and < 10.2.10-h36; >= 11.2.0 and < 11.2.7-h13

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://security.paloaltonetworks.com/CVE-2026-0257
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0257
- [other] https://cert-portal.siemens.com/productcert/html/ssa-967325.html

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.