alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SERVER Ivanti Connect Secure Authentication Bypass (CVE-2026-104935)"; flow:established,to_server; http.uri; content:"/dana-na/auth/url_default/welcome.cgi"; http.header; to_lowercase; content:"x-dscgi-path|3a 20|"; fast_pattern; pcre:"/^[^\x0d\x0a]*?\x2f[wW][uU]\x2e[cC][gG][iI]/R"; reference:url,www.volexity.com/blog/2026/10/13/a-series-of-unauthenticated-events-chained-exploitation-of-ivanti-connect-secure-zero-days/; reference:cve,2026-104935; classtype:attempted-user; sid:2072427; rev:1; metadata:affected_product Ivanti, attack_target Server, tls_state TLSDecrypt, created_at 2026_10_13, cve CVE_2026_104935, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2026_10_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)