Hackers Target Zimbra Servers in Active Exploitation Campaign
Summary
CERT Polska has observed active exploitation of a vulnerability in Zimbra Collaboration servers, identified as CVE-2026-73570. This indicates a real-world threat to users of the Zimbra platform.
IFF Assessment
FOE
The active exploitation of a vulnerability in a widely used collaboration platform represents a direct threat to organizations and individuals using that platform.
Severity
8.9
High
Defender Context
Organizations using Zimbra Collaboration should prioritize patching this vulnerability immediately due to observed active exploitation. Defenders should monitor their Zimbra instances for any signs of compromise and review access logs for suspicious activity related to CVE-2026-73570.