CVE-2026-0257 — Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
CVE-2026-0257: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Palo Alto Networks |
| Product | PAN-OS |
| Date added | 2026-05-29 |
| Due date | 2026-06-01 |
| Ransomware campaign use | Known |
Description
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://security.paloaltonetworks.com/CVE-2026-0257 ; https://nvd.nist.gov/vuln/detail/CVE-2026-0257
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0257
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog