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Hackers breached over 270 Zimbra servers in ongoing attacks
August 25, 2026 · BleepingComputer · Severity: HIGH
Threat actors have already compromised over 270 Zimbra instances in remote code execution attacks targeting a high-severity Zimbra Collaboration Suite (ZCS) vulnerability.
Key Takeaways
- Attackers exploited a high-severity Zimbra Collaboration Suite remote code execution vulnerability.
- Over 270 Zimbra email servers were compromised in an ongoing wave of targeted attacks.
- The breach impacts enterprise communications, risking sensitive data theft and lateral movement.