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VulnerabilitiesAug 24, 2026

Exploited Zimbra Flaw Highlights Shrinking Window to Patch

CISA mandates a 3-day patch deadline for a critical Zimbra vulnerability, CVE-2026-73570.

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Summary

CISA has issued an urgent directive, requiring federal agencies to patch a critical vulnerability in Zimbra Collaboration Suite within three days. Identified as CVE-2026-73570, the flaw enables attackers to achieve full takeover of a user's communications, posing a significant risk to sensitive data and operations. The rapid response highlights the shrinking window between vulnerability disclosure and exploitation, emphasizing the need for swift patching protocols.

Indicators of Compromise

  • cve — CVE-2026-73570

Entities

Zimbra Collaboration Suite (product)Zimbra (vendor)CISA BOD (product)