Zimbra CVE-2026-73570: What intruders did on compromised mail servers, and what to check on yours
An unauthenticated command injection in the SNMP notification path of Zimbra Collaboration was probed before public disclosure and exploited at scale afterwards. Microsoft's reconstruction shows web shells, a route to root through PAM, credential dumps and a cloud exfiltration attempt. The fix is 10.1.20. The work starts after the patch.
Read article

