THREAT OPS › CVEs › CVE-2026-73570
CVE-2026-73570 — Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
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.
Vulnerability details
- Affected productsZimbra Collaboration Suite (ZCS)
- KEV remediation due2026-08-24
Related reporting
- August 2026 CVE Landscaperecordedfuture
- Zimbra Multiple Vulnerabilitieshkcert
- CVE-2026-73570: Zimbra RCE Exploitedsocradar_blog
- [NVD] CVE-2026-73570 (HIGH 8.9) — 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 unauthenticatednvd
- CISA Adds One Known Exploited Vulnerability to Catalogcisa_advisories
- [CISA KEV] CVE-2026-73570 — Synacor Zimbra Collaboration Suite (ZCS): Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerabilitycisa_kev
- Attackers Exploit Zimbra SNMP Flaw for Unauthenticated Remote Code Executionthehackernews