ET WEB_SPECIFIC_APPS UTT formReConnect Isp_Name Parameter Command Injection Attempt (CVE-2026-2847)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS UTT formReConnect Isp_Name Parameter Command Injection Attempt (CVE-2026-2847)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:21;
    content:"/goform/formReConnect"; fast_pattern;
    http.request_body;
    content:"Isp_Name|3d|";
    pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,github.com/cha0yang1/UTT520CVE/blob/main/UTTRCE2.md;
    reference:cve,2026-2847;
    classtype:attempted-admin;
    sid:2067911; rev:1;
    metadata:affected_product UTT, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_02_24, cve CVE_2026_2847, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_02_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)