Palo Alto GlobalProtect VPN Auth Bypass Flaw Now Exploited in Attacks

Palo Alto GlobalProtect VPN auth bypass flaw now exploited in attacks

Palo Alto Networks is warning that hackers are now exploiting a PAN-OS GlobalProtect authentication bypass flaw, tracked as CVE-2026-0257, in attacks attempting to breach corporate networks.

PAN-OS GlobalProtect Authentication Bypass (CVE-2026-0257) Under Active Exploitation

Palo Alto Networks has warned that a recently disclosed medium-severity security flaw impacting PAN-OS and Prisma Access has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-0257 (CVSS score: 7.8), refers to a case of authentication bypass that could be exploited by bad actors to set up VPN connections. "Authentication bypass vulnerabilities in the

Palo Alto Networks PAN-OS Authentication Vulnerability Bypass Exploited in the Wild

Palo Alto Networks authentication bypass vulnerability, CVE-2026-0257, affecting PAN-OS and Prisma Access, is now being actively exploited in the wild, with CISA adding it to the Known Exploited Vulnerabilities (KEV) catalog on May 29, 2026. Palo Alto Networks published its security advisory on May 13, 2026, warning that CVE-2026-0257 enables a remote unauthenticated attacker to forge authentication override cookies and establish unauthorized VP…

Rapid7 Observed Exploitation of PAN-OS GlobalProtect Authentication Bypass Vulnerability (CVE-2026-0257)

Overview On 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 ac…