Palo Alto Networks · PAN-OS
CVE-2026-0257
PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities
What it is
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.
CISA: 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.
Deadline for US federal agencies: June 1, 2026
More exploited flaws from Palo Alto Networks
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Oct 14, 2026 | Code Injection | PAN-OS | High 8.6 | 1.7% |
| May 6, 2026 | Out-of-bounds Write | PAN-OS | Critical 9.3 | 42% |
| Feb 20, 2025 | File Read | PAN-OS | High 7.1 | 2.0% |
| Feb 18, 2025 | Authentication Bypass | PAN-OS | High 8.8 | 98% |
| Dec 30, 2024 | Malicious DNS Packet | PAN-OS | High 8.7 | 29% |
| Nov 18, 2024 | Management Interface Authentication Bypass | PAN-OS | Critical 9.3 | 99.8% |
| Nov 18, 2024 | Management Interface OS Command Injection | PAN-OS | Medium 6.9 | 94% |
| Apr 12, 2024 | Command Injection | PAN-OS | Critical 10.0 | >99.9% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.