Summary
generated automatically from NVD dataZimbra Collaboration (ZCS) before 10.1.20 has an OS command injection flaw (CWE-78) in SNMP notification processing, affecting systems where the optional zimbra-snmp package is installed and SNMP notifications are enabled. An unauthenticated attacker can send specially crafted SMTP requests containing unsanitized input to run arbitrary operating system commands as the Zimbra user. It is rated 8.9 (HIGH, CVSS v3.1) and is listed in the CISA KEV catalog, which indicates active exploitation.
NVD 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.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-08-21. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-08-24
EPSS · FIRST.org
71.7%probability of exploitation in the next 30 days
Higher than 99% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-19, recomputed daily by FIRST.org.
CVSS v3.1 Score
Information
- Published
- 13 août 2026
- Updated
- 24 août 2026
- Status
- Analyzed
- Source
- cve@mitre.org
Affected products
Weaknesses (CWE)
References (4)
- https://wiki.zimbra.com/wiki/Security_CenterRelease Notes
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-73570US Government Resource
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