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CVE-2026-73570

Quick assessment

Affected
Zimbra Collaboration
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zimbra Collaboration是Zimbra公司的一套协作与通信平台。 Zimbra Collaboration 10.1.20之前版本存在命令注入漏洞，该漏洞源于SNMP通知处理期间未正确清理不可信输入，在安装zimbra-snmp包并启用SNMP通知时，未经身份验证的攻击者可以发送特制的SMTP请求，可能导致以Zimbra用户身份执行任意操作系统命令。

CVSS 8.9 · High KEV EPSS 11.74% · P96

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Zimbra Collaboration < 10.1.20 affected
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I. Basic Information for CVE-2026-73570

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Zimbra Collaboration 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zimbra Collaboration是Zimbra公司的一套协作与通信平台。 Zimbra Collaboration 10.1.20之前版本存在命令注入漏洞，该漏洞源于SNMP通知处理期间未正确清理不可信输入，在安装zimbra-snmp包并启用SNMP通知时，未经身份验证的攻击者可以发送特制的SMTP请求，可能导致以Zimbra用户身份执行任意操作系统命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zimbra Collaboration 0 ~ 10.1.20 -

II. Public POCs for CVE-2026-73570

# POC Description Source Link Shenlong Link
1 Zimbra Collaboration Suite (ZCS) before version 10.1.20 is vulnerable to OS command injection in the SNMP notification processing due to improper input sanitization. According to the NVD, when SNMP notifications are enabled and the zimbra-snmp package is installed, an unauthenticated attacker can inject arbitrary commands using crafted SMTP requests that result in malicious log entries. The swatchdog service monitors the log, and upon matching a pattern, passes the log content to zmsnmptrapd, which unsafely uses the Perl backtick operator to execute commands. This can ultimately allow remote attackers to execute arbitrary operating system commands as the zimbra user. Active exploitation of this vulnerability has been observed in the wild, as confirmed by CERT Polska and CISA. https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2026/CVE-2026-73570.yaml POC Details
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III. Intelligence Information for CVE-2026-73570

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Vendor Advisories for CVE-2026-73570 (2)

Same Patch Batch · Zimbra · 2026-08-13 · 7 CVEs total

CVE-2026-73576 6.3 MEDIUM Zimbra <10.1.17 OnlyOffice弱密钥生成致JWT伪造
CVE-2026-73572 6.1 MEDIUM Zimbra <10.1.17 存储型XSS漏洞
CVE-2026-73575 3.1 LOW ZCS<10.1.17 CSRF漏洞
CVE-2026-73573 3.1 LOW Zimbra Collaboration <10.1.17 路径穿越漏洞
CVE-2026-73571 3.1 LOW Zimbra Collaboration <10.1.17 授权绕过漏洞
CVE-2026-73574 3.1 LOW Zimbra<10.1.17经典Web客户端LFI漏洞

IV. Related Vulnerabilities

Same product: Collaboration
Same vendor: Zimbra
Same weakness: CWE-78

V. Comments for CVE-2026-73570

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