CERT24Hackers breached over 270 Zimbra servers in ongoing attacksLoading data…
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Hackers breached over 270 Zimbra servers in ongoing attacks

Attackers have compromised more than 270 Zimbra instances by exploiting the high-severity Zimbra Collaboration Suite vulnerability CVE-2026-73570. Shadowserver observed 274 compromised instances on August 22, 2026, and at least 8,200 unpatched instances.

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Hackers breached over 270 Zimbra servers in ongoing attacks

Attackers have compromised more than 270 Zimbra instances by exploiting the high-severity Zimbra Collaboration Suite vulnerability CVE-2026-73570. Shadowserver observed 274 compromised instances on August 22, 2026, and at least 8,200 unpatched instances.