alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Alcatel-Lucent Authentication Bypass Attempt (CVE-2025-52689)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:20; content:"/echo.fcgi/api/login"; fast_pattern; http.header; content:"X-API-App-Id|3a 20|hyapiinterface"; content:"X-API-Timestamp|3a 20|"; pcre:"/^\d{10}/R"; content:"X-API-Signature|3a 20|"; pcre:"/^[A-F0-9]{32}/R"; reference:url,github.com/UltimateHG/CVE-2025-52689-PoC; reference:cve,2025-52689; classtype:web-application-attack; sid:2063533; rev:1; metadata:affected_product Alcatel_Lucent, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_16, cve CVE_2025_52689, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_07_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)