ET WEB_SPECIFIC_APPS SolarWinds Web Help Desk Authentication Bypass (CVE-2025-40536)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS SolarWinds Web Help Desk Authentication Bypass (CVE-2025-40536)";
    flow:established,to_server;
    http.uri;
    content:"/helpdesk/WebObjects/Helpdesk.woa/wo/"; fast_pattern;
    content:"/ajax/";
    content:"wopage|3d|";
    http.method;
    content:"GET";
    reference:url,horizon3.ai/attack-research/cve-2025-40551-another-solarwinds-web-help-desk-deserialization-issue/;
    reference:cve,2025-40536;
    classtype:web-application-attack;
    sid:2067188; rev:1;
    metadata:affected_product SolarWinds, attack_target Server, tls_state TLSDecrypt, created_at 2026_01_29, cve CVE_2025_40536, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Exploit, updated_at 2026_01_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)