alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS QNAP Malware Remover Python Code Injection (CVE-2025-11837)"; flow:established,to_server; http.cookie; content:"QTS_SSID|3d|"; pcre:"/^.*?(?:[\x27\x28\x29]|\x25(?:25)?2[789])/R"; reference:url,rustlang.rs/posts/blog_cve_2025_11837_en/; reference:cve,2025-11837; classtype:web-application-attack; sid:2071328; rev:1; metadata:affected_product QNAP, attack_target Server, tls_state TLSDecrypt, created_at 2026_07_27, cve CVE_2025_11837, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Significant, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)