Zimbra servers hit in active exploitation campaign for CVE-2026-73570
Source headline: Hackers Target Zimbra Servers in Active Exploitation Campaign
Intelligence Summary
Poland’s CERT Polska observed exploitation of a Zimbra Collaboration vulnerability. The flaw tracked as CVE-2026-73570 is being actively targeted, according to the report. The activity suggests threat actors are leveraging the weakness in real environments. This increases the risk of compromise for organizations running Zimbra Collaboration. Users should check their exposure to CVE-2026-73570 and apply the appropriate fixes immediately.
Recommended Action
Check your exposure to CVE-2026-73570 and apply the vendor fix once available. Until then, watch authentication and outbound traffic logs for the indicators described in the source. This signal rests on a single report, so corroborate it before acting on anything irreversible.