alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Linksys linsetIpv6 tunrd_Prefix Parameter Buffer Overflow Attempt (CVE-2025-9481)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:15; content:"/goform/setIpv6"; fast_pattern; http.request_body; content:"tunrd_Prefix|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_35/35.md#poc; reference:cve,2025-9481; classtype:web-application-attack; sid:2064201; rev:1; metadata:affected_product Linksys, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_08_28, cve CVE_2025_9481, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)