alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Cisco IOS XE Web Server execCLI in SOAP (CVE-2023-20198)"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"|3c|wsse|3a|UsernameToken"; fast_pattern; content:"|3c|execCLI|3e|"; threshold:type limit,seconds 300,count 1,track by_src; reference:url,blog.talosintelligence.com/active-exploitation-of-cisco-ios-xe-software/; reference:cve,2023-20198; classtype:misc-activity; sid:2048943; rev:2; metadata:affected_product Cisco_IOS, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2023_10_30, cve CVE_2023_20198_CVE_2023_20198, deployment Perimeter, deployment SSLDecrypt, former_category INFO, confidence Medium, signature_severity Informational, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_10_21, reviewed_at 2023_10_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)