Poland’s CERT Polska has observed active exploitation of CVE-2026-73570 in Zimbra Collaboration. Email platforms sit at the intersection of internet exposure and sensitive data.
Our analysis
A mail-server foothold hands attackers inboxes, credentials in transit and a trusted platform for internal phishing. “Active exploitation” changes patching from routine to urgent, and means you should also hunt for signs you were already hit. For Cyprus organisations, a compromised mail server is often the first domino before a wider breach.
What you should do
- Apply Zimbra updates immediately and check CERT advisories for indicators of compromise.
- Restrict admin interfaces and put a WAF or allow-list in front of the platform.
- Hunt for webshells and unusual outbound mail since disclosure.
- Regularly pentest internet-facing collaboration apps.
How CyprusPentest helps: our external network penetration testing and web application penetration testing find exploitable exposure on your perimeter.
Source: eSecurity Planet.