Palo Alto GlobalProtect VPN Auth Bypass Flaw (CVE-2026-0257) Exploited in Attacks
In May 2026, Palo Alto Networks disclosed an authentication bypass vulnerability (CVE-2026-0257) in their PAN-OS GlobalProtect portal and gateway, allowing unauthenticated attackers to establish unauthorized VPN connections. Initially rated as medium severity, the flaw's risk escalated when active exploitation was observed starting May 17, 2026, leading to unauthorized access attempts on corporate networks. ([security.paloaltonetworks.com](https://security.paloaltonetworks.com/CVE-2026-0257?utm_source=openai)) The active exploitation of CVE-2026-0257 underscores the critical need for organizations to promptly apply security patches and review VPN configurations to prevent unauthorized access, especially as attackers increasingly target remote access solutions.
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