Critical Zimbra Flaw Lets Attackers Inject Commands Through the SNMP Monitoring Service

Cybersecuritynews •Abinaya • July 22, 2026

Zimbra fixed a critical Zimbra Collaboration Suite (ZCS) command injection flaw in version 10.1.20 that could allow attackers to abuse the SNMP service and execute arbitrary commands on affected servers. The flaw affects environments where SNMP notifications are enabled, potentially allowing remote attackers to manipulate monitoring data and inject system-level commands, which could lead to […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Zimbra 10.1.20 Patches Critical SNMP Command Injection Vulnerability Zimbra released version 10.1.20 to address nine security vulnerabilities, including a critical command injection flaw in the SNMP monitoring component. This vulnerability allows attackers to execute arbitrary commands on affected servers where SNMP notifications are enabled. The flaw could lead to manipulation of monitoring data and unauthorized command execution. Alongside the critical flaw, multiple cross-site scripting (XSS) vulnerabilities were also patched. Organizations using Zimbra Collaboration Suite (ZCS) are urged to update to the latest version to mitigate these risks. The update was published on July 20, 2026, and is crucial for maintaining system security. 4 sources 72

Extracted Entities

Critical Zimbra Flaw Lets Attackers Inject Commands Through the SNMP Monitoring Service

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Extracted Entities

Attack Types (1)

MITRE ATT&CK (1)

Platforms (2)