alert ip any any -> $HOME_NET 5060 (msg:"ET EXPLOIT HP Poly VVX 450 VoIP Unauthenticated Buffer Overflow (CVE-2026-0826)"; flow:established,to_server; content:"a|3d|candidate|3a|"; fast_pattern; pcre:"/^[^\x0d\x0a]{257,}/R"; reference:url,www.rapid7.com/blog/post/ve-cve-2026-0826-critical-unauthenticated-stack-buffer-overflow-hp-poly-vvx-trio-voip-phones-fixed/; reference:cve,2026-0826; classtype:attempted-user; sid:2071511; rev:1; metadata:attack_target Server, created_at 2026_08_13, cve CVE_2026_0826, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)