Rapid7 Observed Exploitation of PAN-OS GlobalProtect Authentication Bypass Vulnerability (CVE-2026-0257) (opens in new tab)  Content type: Blog  20 articles covering this post

OverviewOn May 13, 2026, Palo Alto Networks published a security advisory for CVE-2026-0257, a medium severity authentication bypass affecting PAN-OS and Prisma Access when a specific configuration is present. Successful exploitation of this vulnerability allows a remote unauthenticated attacker to successfully establish a VPN connection through the GlobalProtect gateway of an affected appliance.Rapid7 MDR identified successful exploitation across numerous customers, however we did not observ...