Zimbra security advisory (AV26-816) – Update 1

Serial number: AV26-816
Date: August 14, 2026
Updated: August 21, 2026

As of August 13, 2026, Zimbra is affected by vulnerabilities in the following product:

  • Collaboration - Prior to 10.1.20

The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.

Update 1

On August 21, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-73570 to their Known Exploited Vulnerabilities (KEV) Database.

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