CVE-2026-73570

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.

Affected products

Zimbra Collaboration

Synacor Zimbra Collaboration Suite

< 10.1.20

CVSS 3.1

8.9 HIGH

EPSS

0.5% (43th percentile)

Weakness

CWE-78

NVD status

Analyzed

Published

2026-08-13