ET WEB_SPECIFIC_APPS SmarterTools SmarterMail ConnectToHub Unauthenticated Remote Code Execution (CVE-2026-24423)
Sourceet/open
CreatedFebruary 3, 2026
UpdatedFebruary 3, 2026
Classificationweb-application-attack
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS SmarterTools SmarterMail ConnectToHub Unauthenticated Remote Code Execution (CVE-2026-24423)"; flow:established,to_client; http.response_body; content:"|22|ClusterID|22 3a|"; content:"|22|isStandby|22 3a|"; content:"|22|false|22|"; nocase; within:8; content:"|22|SystemMount|22 3a|"; content:"|22|CommandMount|22 3a|"; fast_pattern; reference:url,xz.aliyun.com/news/91523; reference:cve,2026-24423; classtype:web-application-attack; sid:2067266; rev:1; metadata:affected_product SmarterTools_SmarterMail, attack_target Server, tls_state TLSDecrypt, created_at 2026_02_03, cve CVE_2026_24423, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_02_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
References
Metadata
affected productSmarterTools_SmarterMail
attack targetServer
tls stateTLSDecrypt
created at2026_02_03
deploymentSSLDecrypt
confidenceHigh
signature severityMajor
tagExploit
updated at2026_02_03
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application
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