Check Point released updates for CVE-2026-50751, an authentication bypass in IKEv1-based Remote Access and Mobile Access VPNs that has been exploited since May and impacted a few dozen organizations, including a confirmed Qilin ransomware incident. They also patched CVE-2026-50752, a certificate validation flaw in IKEv1 site-to-site VPNs, and urge customers to move to IKEv2, enforce machine certificates, or apply the provided mitigations.

CISA has directed U.S. federal agencies to fix a critical authentication bypass in Check Point Remote Access and Mobile Access VPNs (CVE-2026-50751) by June 11. The flaw, exploited by Qilin ransomware affiliates since early May, affects IKEv1 deployments without machine certificates. Check Point released updates and mitigation steps for unpatched environments.

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