CVE-2026-73570: synacor zimbra_collaboration_suite

CVSS 8.9 (high) · listed as exploited by CISA since 2026-08-21 · published 2026-08-13

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 (NVD): synacor zimbra_collaboration_suite

Fixed in (NVD): 10.1.20

Weakness: CWE-78

Source: NVD CVE-2026-73570

References

• https://wiki.zimbra.com/wiki/Security_Center
• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
• https://moje.cert.pl/komunikaty/2026/145/aktywnie-wykorzystywana-podatnosc-w-zimbra-collaboration-suite/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-73570

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