FlagThis — Daily Cybersecurity Intelligence Briefing

In June 2026, Check Point disclosed two critical authentication bypass flaws (CVE‑2026-50751 CVSS 9.3, CVE‑2026-50752 CVSS 7.4) in Quantum VPN gateways that allow unauthenticated attackers to establish IKEv1 VPN sessions when legacy Remote Access clients are enabled and machine‑certificate validation is not enforced; post‑authentication steps can lead to privileged remote code execution. Active exploitation of CVE‑2026-50751 was observed from May 7 2026, linked to a Qilin ransomware affiliate, prompting urgent warnings from the Dutch NCSC and inclusion considerations for CISA’s KEV catalog.