CVE-2026-50751 is a critical authentication bypass (CVSS 9.8, EPSS 93.88th percentile) in the deprecated IKEv1 VPN protocol implementation on Check Point Security Gateways, with active exploitation confirmed in the wild by Rapid7. An unauthenticated remote attacker can send malformed IKEv1 packets that bypass the authentication exchange, gaining unauthorized VPN access to protected network segments. Check Point has released an emergency hotfix and issued an ACTION REQUIRED notice.