CVE Watch24 ago 2026

CVE-2026-73570

Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability

CVSS

8.9

Alto

EPSS

76.6%

p100

KEV

SÍ

21 ago 2026

Exploit Today

0-100

Publicado: 13 ago 2026 · Última mod.: 24 ago 2026 · CWE-78

EPSS · 30d

71.7%EPSS · 30 días76.6%

2026-10-152026-11-11

Ficha del catálogo KEV

Producto

Synacor / Zimbra Collaboration Suite (ZCS)

Vulnerabilidad

Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability

Añadido a KEV

21 ago 2026

Remediar antes de

24 ago 2026

Uso conocido en ransomware

Descripción resumida

Zimbra Collaboration Suite (ZCS) contains an OS command injection vulnerability which could allow an unauthenticated attacker to send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.

Acción requerida

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.

Notas

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://blog.zimbra.com/2026/07/patch-release-update-zimbra-10-1-20/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-73570

Descripción técnica

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.

Referencias oficiales

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