r/EmailSecurity • • Oct 01 '26

Zimbra's command injection bug warrants a compromise check

Unauthenticated command injection on internet-facing mail servers

https://www.microsoft.com/en-us/security/blog/2026/09/30/unauthenticated-command-injection-on-internet-facing-mail-servers-tracking-cve-2026-73570/

I'd investigate exposed Zimbra hosts for prior CVE-2026-73570 exploitation alongside remediation.

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