CVE-2026-73570Command Injection RCE in Zimbra Collaboration
Zimbra Collaboration Suite (ZCS) contains an OS command injection vulnerability which could allow an unauthenticated attacker to send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.
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Zimbra Collaboration Suite es vulnerable a la ejecución remota de comandos (RCE) sin autenticación debido a una sanitización insuficiente en las notificaciones SNMP. Los atacantes pueden ejecutar código arbitrario en el servidor mediante peticiones SMTP especialmente diseñadas. Esta vulnerabilidad está confirmada como activamente explotada en ataques reales.
Relevant roles
Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:LCWE-78CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Affects
synacor:zimbra_collaboration_suiteTechnical description
A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zimbra-snmp package is installed and SNMP notifications are enabled. Due to improper sanitization of untrusted input during SNMP notification processing, an unauthenticated attacker can send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.