alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Linksys WPS PIN Parameter Command Injection Attempt (CVE-2025-5438)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:11; content:"/goform/WPS"; fast_pattern; http.request_body; content:"PIN|3d|"; pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R"; reference:cve,2025-5438; reference:url,github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_1/1.md; classtype:attempted-admin; sid:2062707; rev:1; metadata:affected_product Linksys, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_06_02, cve CVE_2025_5438, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_06_02, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)