CISA warns that a Russian-speaking threat actor has harvested 86,644 valid logins from internet-facing FortiGate firewalls and VPNs using SSL VPN interception, GPU-powered hash cracking, and brute-force attacks. Major government entities and critical infrastructure providers are affected. CISA advises resetting credentials, enforcing PBKDF2 for admin logins, enabling phishing-resistant MFA, and tightening management access.

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.