alert tcp any any -> $HOME_NET 443 (msg:"ET WEB_SERVER Check Point VPN IKEv1 (TCPT) Authentication Bypass (CVE-2026-50751)"; flow:established,to_server; content:"|00 00 00 02|"; offset:4; depth:4; content:"|01 10|"; offset:24; depth:2; content:"|3c f1 87 b2 47 40 29 ea 46 ac 7f d0 ea f2 89 f5 00 00 00 04|"; fast_pattern; threshold:type limit,count 1,seconds 300,track by_src; reference:url,labs.watchtowr.com/marking-your-own-homework-check-point-remote-access-vpn-ikev1-authentication-bypass-cve-2026-50751/; reference:cve,2026-50751; classtype:attempted-user; sid:2071165; rev:1; metadata:attack_target Server, created_at 2026_07_13, cve CVE_2026_50751, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)