ET WEB_SPECIFIC_APPS TrendNet uapply.cgi DeviceURL Parameter Command Injection Attempt (CVE-2025-15471)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS TrendNet uapply.cgi DeviceURL Parameter Command Injection Attempt (CVE-2025-15471)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:11;
    content:"/uapply.cgi"; fast_pattern;
    http.request_body;
    content:"|22|apply_do|22|";
    content:"|22|setDeviceURL|22|"; within:20;
    content:"|22|DeviceURL|22|";
    content:"|22|DeviceURL|22|";
    pcre:"/^(?:\x3a(?:\x20\x22|\x22))?[^\x2c\x7d$]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,pentagonal-time-3a7.notion.site/TrendNet-TEW-811DRU-2d2e5dd4c5a58016a612e99853b835f8;
    reference:cve,2025-15471;
    classtype:attempted-admin;
    sid:2066608; rev:1;
    metadata:affected_product TrendNet, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_01_07, cve CVE_2024_0918, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_01_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)