CVE-2026-73570
Received Received - Intake

Remote Code Execution in Zimbra Collaboration

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: MITRE

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.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-73570
EUVD
EUVD-2026-58069

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
zimbra zimbra_collaboration to 10.1.20 (exc)
zimbra zimbra_collaboration 10.0.16
zimbra zimbra_collaboration 10.1.10

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

This is a remote code execution vulnerability in Zimbra Collaboration (ZCS) before version 10.1.20 when the optional zimbra-snmp package is installed and SNMP notifications are enabled. It occurs due to improper sanitization of untrusted input during SNMP notification processing. An unauthenticated attacker can send specially crafted SMTP requests to execute arbitrary operating system commands as the Zimbra user.

Detection Guidance

Check if the zimbra-snmp package is installed and SNMP notifications are enabled in Zimbra Collaboration. Verify ZCS version is below 10.1.20. Inspect SMTP logs for unusual or crafted requests targeting SNMP processing.

Impact Analysis

An attacker could exploit this to run malicious commands on the server running Zimbra Collaboration. This may lead to unauthorized data access, system compromise, or disruption of services. Systems with the vulnerable configuration (zimbra-snmp installed and SNMP notifications enabled) are at risk.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR (data protection) or HIPAA (health information privacy). Organizations must address this to maintain regulatory compliance and protect sensitive data.

Mitigation Strategies

Upgrade Zimbra Collaboration to version 10.1.20 or later. If upgrading is not immediately possible, disable the zimbra-snmp package and SNMP notifications. Monitor for suspicious activity in SMTP logs.

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