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Hackers breached over 270 Zimbra servers in ongoing attacks

BleepingComputer·August 25, 2026·1 min read
Hackers breached over 270 Zimbra servers in ongoing attacks

Threat actors have compromised over 270 Zimbra instances in ongoing remote code execution attacks targeting a high-severity vulnerability in Zimbra Collaboration Suite (ZCS). The attacks highlight the critical need for organizations to patch and secure their email servers against active exploitation.

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