alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Cisco ISE ERS API Unauthenticated RCE (CVE-2025-20281)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/deployment-rpc/enableStrongSwanTunnel"; fast_pattern; startswith; http.request_body; content:"java.lang.String"; pcre:"/^.*?[\x3b\x7c\x60\x24]/R"; reference:url,www.zerodayinitiative.com/blog/2025/7/24/cve-2025-20281-cisco-ise-api-unauthenticated-remote-code-execution-vulnerability; reference:cve,2025-20281; classtype:web-application-attack; sid:2063545; rev:2; metadata:affected_product Cisco_ISE, attack_target Server, tls_state TLSDecrypt, created_at 2025_07_17, cve CVE_2025_20281, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_07_31, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)