ET WEB_SPECIFIC_APPS SmarterTools SmarterMail ConnectToHub Remote Code Execution (CVE-2026-24423)

Query · suricata

flow:established,to_server;
http.uri;
content:"/api/v1/settings/sysadmin/connect-to-hub"; fast_pattern;
http.request_body;
content:"|22|hubAddress|22 3a|";
content:"|3a 2f 2f|"; within:20;
http.method;
content:"POST";
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS SmarterTools SmarterMail ConnectToHub Remote Code Execution (CVE-2026-24423) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS SmarterTools SmarterMail ConnectToHub Remote Code Execution (CVE-2026-24423)";
    flow:established,to_server;
    http.uri;
    content:"/api/v1/settings/sysadmin/connect-to-hub"; fast_pattern;
    http.request_body;
    content:"|22|hubAddress|22 3a|";
    content:"|3a 2f 2f|"; within:20;
    http.method;
    content:"POST";
    reference:url,www.vulncheck.com/blog/smartermail-connecttohub-rce-cve-2026-24423;
    reference:cve,2026-24423;
    classtype:web-application-attack;
    sid:2068802; rev:1;
    metadata:affected_product SmarterTools_SmarterMail, attack_target Server, tls_state TLSDecrypt, created_at 2026_04_16, cve CVE_2026_24423, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_04_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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