Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
Description
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Palo Alto Networks
- Product
- PAN-OS
- CVE
- CVE-2026-0257
- Affected versions
- PAN-OS 12.1: from 12.1.0 to 12.1.7 (excluded) — fixed in 12.1.7
PAN-OS 11.2: from 11.2.0 to 11.2.12 (excluded) — fixed in 11.2.12
PAN-OS 11.1: from 11.1.0 to 11.1.15 (excluded) — fixed in 11.1.15
PAN-OS 10.2: from 10.2.0 to 10.2.18-h6 (excluded) — fixed in 10.2.18-h6
Prisma Access 10.2: from 10.2.0 to 10.2.10-h36 (excluded) — fixed in 10.2.10-h36
Prisma Access 11.2: from 11.2.0 to 11.2.7-h13 (excluded) — fixed in 11.2.7-h13 (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 9.1
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- June 1, 2026 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- May 29, 2026
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.