Security Advisory – Action Required – Active Exploitation of Check Point VPN Authentication Bypass (CVE-2026-50751)

Check Point Research has identified active exploitation of CVE-2026-50751, a critical authentication bypass vulnerability affecting Check Point Remote Access VPN and Mobile Access deployments configured to use the deprecated IKEv1 key exchange protocol. By exploiting a logic flaw in certificate validation, an attacker can establish a VPN session without possession of a valid password, effectively bypassing authentication requirements. Additional post-authentication activity is required to access internal resources or escalate privileges. To date, the observed exploitation has been limited to a few dozen targeted organizations globally. One case involved confirmed post-compromise activity associated with Qilin ransomware affiliate. Customers using IKEv1 key exchange protocol are strongly encouraged to apply the available security updates immediately.