ET WEB_SERVER Check Point VPN IKEv1 (TCPT) Authentication Bypass (CVE-2026-50751)

Query · suricata

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;
target:dest_ip;
Raw source ET WEB_SERVER Check Point VPN IKEv1 (TCPT) Authentication Bypass (CVE-2026-50751) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
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;
)

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