# CVE-2026-73570: A Synacor Zimbra Collaboration Suite (ZCS) bug is being used in attacks

Status: Being used now (CISA KEV, added 2026-08-21)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Synacor Zimbra Collaboration Suite (ZCS) (CVE-2026-73570) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-73570. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
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.

## Sources
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://blog.zimbra.com/2026/07/patch-release-update-zimbra-10-1-20/
- https://nvd.nist.gov/vuln/detail/CVE-2026-73570
- https://nvd.nist.gov/vuln/detail/CVE-2026-73570

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.