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HIGH CISA KEV

CVE-2026-73570

CVSS v3

8.9

HIGH

EPSS Score

0.5 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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.

CISA Known Exploited Vulnerability

Date Added
2026-08-21
Patch Due Date
2026-08-24
Ransomware Use
Unknown

Technical details

CVSS v3 Vector
3.1
Published
2026-08-13
Last Modified
2026-08-14

Frequently asked questions

What is 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.

Is CVE-2026-73570 actively exploited?

Yes. CVE-2026-73570 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-24.

What is the CVSS score for CVE-2026-73570?

CVE-2026-73570 has a CVSS v3 base score of 8.9 (HIGH severity), with vector string 3.1.

Is CVE-2026-73570 affecting your environment?

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