alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link system_mgr.cgi Multiple Parameters Command Injection Attempt (CVE-2026-4207)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:23; content:"/cgi-bin/system_mgr.cgi"; fast_pattern; http.request_body; content:"cmd|3d|"; pcre:"/^cgi\x5f(?:firmware\x5fupload|ntp\x5ftime|sms\x5ftest|device)/R"; pcre:"/(?:hostname|command[12]|filename|f\x5fntp\x5fserver)x3d[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/P"; reference:url,github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_144/144.md; reference:cve,2026-4207; classtype:attempted-admin; sid:2072098; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_09_18, cve CVE_2026_4207, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_09_18, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)