ET WEB_SPECIFIC_APPS Nexxt Solutions um_web_upgrade.cgi filename Parameter Command Injection Attempt (CVE-2025-52379)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Nexxt Solutions um_web_upgrade.cgi filename Parameter Command Injection Attempt (CVE-2025-52379)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:23;
    content:"/web/um_web_upgrade.cgi"; fast_pattern;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|put_file|22 3b 20|filename|3d 22|";
    pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits;
    reference:cve,2025-52379;
    classtype:attempted-admin;
    sid:2063496; rev:1;
    metadata:affected_product Nexxt, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_15, cve CVE_2025_52379, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_15, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)