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Zimbra 10.1.20 Patches Critical SNMP Command Injection Vulnerability

Zimbra 10.1.20 Patches Critical SNMP Command Injection Vulnerability

First seen 21 Jul 2026, 21:55 UTC • •
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ThreatCluster AI
ThreatCluster •July 22, 2026 at 18:56 UTC
  • •Zimbra patched a critical command injection vulnerability in version 10.1.20.
  • •The flaw affects systems with SNMP notifications enabled, allowing arbitrary command execution.
  • •Multiple XSS vulnerabilities were also addressed in the same update.

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.

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Timeline

2026-07-20
Zimbra 10.1.20 released
Zimbra released version 10.1.20 to fix nine vulnerabilities, including a critical SNMP command injection flaw.
Gbhackers
2026-07-21
Security advisories published
Multiple cybersecurity outlets reported on the critical SNMP command injection vulnerability in Zimbra.
Securityaffairs.Co
2026-07-22
Cybersecurity community alerted
Cybersecurity news outlets emphasized the urgency of updating Zimbra to prevent exploitation of the critical flaw.
Cybersecuritynews

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