alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Possible ZyXEL P660HN-T v1 RCE (CVE-2017-18368)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"viewlog.asp"; fast_pattern; http.request_body; content:"remote_host|3d|"; pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R"; reference:url,seclists.org/fulldisclosure/2017/Jan/40; reference:cve,2017-18368; reference:url,github.com/pedrib/PoC/blob/master/advisories/zyxel_trueonline.txt; classtype:attempted-admin; sid:2027092; rev:6; metadata:affected_product Zyxel, attack_target Networking_Equipment, tls_state plaintext, created_at 2019_03_18, cve CVE_2017_18368, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2026_11_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)