CISA KEV

CVE-2019-9621

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

Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery (SSRF) vulnerability via the ProxyServlet component.

VendorSynacor

ProductZimbra Collaboration Suite (ZCS)

EPSS81.0%

Added to KEVJul 07, 2025

Remediation DueJul 28, 2025

Known Ransomware UseUnknown

CWECWE-918, CWE-807

Required Action

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

From Disclosure to Action

Know how quickly you need to move.

For CVE-2019-9621, added to the catalogue on Jul 07, 2025 with a remediation deadline of Jul 28, 2025.

Added to KEVJul 07, 2025

Seraph AlertSame day

Remediation DueJul 28, 2025

ValidationOngoing

Overdue457 days overdue

Recommended action: Apply vendor remediation guidance.

Seraph Context

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Exploitation Context

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References

More from Synacor in the KEV catalogue.

CVE-2026-73570Zimbra Collaboration Suite (ZCS)Added Aug 21, 2026 CVE-2025-48700Zimbra Collaboration Suite (ZCS)Added Apr 20, 2026 CVE-2025-66376Zimbra Collaboration Suite (ZCS)Added Mar 18, 2026

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