CVE-2026-73570Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.9 | HIGH | 3.1mitre (CNA) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L |
CISA required action
⚡ Known exploited · remediation due Aug 24, 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Details
- CVE ID
- CVE-2026-73570
- Status
- Analyzed
- Assigner (CNA)
- mitre
- Published
- Aug 13, 2026
- Last modified
- 2026-08-24 13:19 UTC
- Weaknesses
- CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
As published by the CNA in the CVE record.
ZimbraCollaboration1 version range
- before 10.1.20
References
- wiki.zimbra.com https://wiki.zimbra.com/wiki/Security_Center
- wiki.zimbra.com https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- moje.cert.pl https://moje.cert.pl/komunikaty/2026/145/aktywnie-wykorzystywana-podatnosc-w-zimbra-collaboration-suite/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-73570