A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zimbra-snmp package is installed
Only affects Zimbra Collaboration before 10.1.20 when SNMP notifications are enabled in the SNMP monitoring component. Fixed in 10.1.20.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 10.1.20
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Zimbra Collaboration (ZCS) email and collaboration software is affected when its optional SNMP component is installed and enabled. An unauthenticated attacker could exploit this flaw to run arbitrary operating system commands on the server with the privileges of the Zimbra user.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Zimbra Collaboration
fixed in 10.1.20
References 2
wiki.zimbra.com
Questions about CVE-2026-73570
What does this mean?
The SNMP monitoring component has a command injection flaw. It can let an attacker run operating system commands on the server.Source: wiki.zimbra.com, wiki.zimbra.com
Am I affected, and how do I check?
Zimbra Collaboration versions before 10.1.20 are affected when the optional zimbra-snmp package is installed and SNMP notifications are enabled in the SNMP monitoring component. Check whether that package is installed and whether SNMP notifications are turned on.Source: wiki.zimbra.com, wiki.zimbra.com
What should I do about it?
Upgrade Zimbra Collaboration to 10.1.20, the fixed version.Source: wiki.zimbra.com, wiki.zimbra.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-08-21, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data