[KEV] CVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
KEVActive exploitation (KEV)
CISA KEV means this flaw has been seen exploited in real attacks — not predicted, observed. Treat it as urgent regardless of its score.
What to do
- On CISA KEV — actively exploited. Patch immediately.
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.
CVE · detail
- CVE-2026-73570nvd ↗KEVEPSS 32%
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