alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Totolink A3700R Multiple Authentication Bypass cstecgecgi.cgi Endpoints (CVE-2025-3663 - CVE-2025-3668)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:20; content:"/cgi-bin/cstecgi.cgi"; fast_pattern; http.header_names; content:!"|0d 0a|cookie|0d 0a|"; nocase; http.request_body; content:"|22|topicurl|22 3a 22|"; pcre:"/^(?:setL2tpServerCfg|setUrlFilterRules|setScheduleCfg|setUPnPCfg|setWiFiEasyGuestCfg|setWiFiEasyCfg|setSmartQosCfg|setDdnsCfg)/R"; reference:cve,2025-3665; reference:cve,2025-3666; reference:url,avender-bicycle-a5a.notion.site/CVE-1ab53a41781f804898a0effa45d0f15d; reference:cve,2025-3664; reference:cve,2025-3668; reference:cve,2025-3667; reference:cve,2025-3663; classtype:web-application-attack; sid:2061620; rev:1; metadata:affected_product TOTOLINK, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_04_16, cve CVE_2025_3663_CVE_2025_3668, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_04_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)