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;)