alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS UniFi Network Application Unauthenticated Path Traversal (CVE-2026-22557)"; flow:established,to_server; http.uri; content:"/guest/s/default/login|3f|"; fast_pattern; content:"page_error|3d|"; pcre:"/^[^\x26]*?(?:(?:\x2e|%+(?:25)?2[Ee]|%+(?:25)?32%+(?:25)?[46]5){1,2}(?:\x2f|\x5c|%+(?:25)?(?:25)?5[Cc]|%+(?:25)?2[Ff]){1,}){2,}/R"; http.referer; content:"/guest/s/default"; reference:url,github.com/ThePotatoOfDoom/CVE-2026-22557-PoC; reference:cve,2026-22557; classtype:web-application-attack; sid:2070135; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_07_01, cve CVE_2026_22557, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_01, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)