CVE-2026-50751

Check Point has disclosed CVE-2026-50751, a critical (CVSS 9.3) improper authentication flaw (CWE-287) in the certificate validation logic for Remote Access and Mobile Access VPN when the deprecated IKEv1 key exchange is used. An unauthenticated remote attacker can exploit this logic flow weakness during IKEv1 negotiation to bypass user authentication entirely. Successful exploitation lets the attacker establish a remote access VPN connection without a valid user password, gaining access to the organization's internal network resources (high confidentiality impact per the CVSS score). Any organization running a Check Point Security Gateway on Gaia OS or Gaia Embedded with IKEv1-based Remote Access/Mobile Access configured is affected; specific affected and fixed versions are in Check Point's advisory. The flaw is being exploited in the wild — it was added to CISA's Known Exploited Vulnerabilities catalog on 2026-06-08 with known ransomware use and an EPSS of 83.8% — and it was disclosed alongside other critical Check Point VPN certificate flaws per recent headlines.

What to do: Upgrade affected Security Gateways to the fixed releases identified in Check Point's advisory (version numbers are not specified in the source data), prioritizing internet-facing VPN gateways; as an interim mitigation, move Remote Access/Mobile Access clients to IKEv2 or disable IKEv1. Review VPN authentication logs for sessions established without valid credentials, given known in-the-wild and ransomware exploitation. Federal agencies must apply mitigations per BOD 22-01, and defenders should beware of fake 'public PoC' repositories spreading malware (ChocoPoC RAT), since no legitimate public PoC is known.