Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability

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• NewsExploited · CISA KEVSynacor · Zimbra Collaboration Suite

  Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability

  CVE-2020-7796

  Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery vulnerability if WebEx zimlet installed and zimlet JSP is enabled.

  CISA's required action · due 10 Mar 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: wiki.zimbra.com · nvd.nist.gov

  Added to KEV 17 Feb 2026 · Source checked 4 Nov 2026, 16:40 UTC · CISA KEV entry

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