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CVE-2019-9621: Synacor Zimbra Collaboration Suite (ZCS)

EPSS81.0%No. 614 of 1739 in KEV
CVE year2019~6 yrs before listing
Same vendor in KEV19
Same product17
FieldValue
VendorSynacor
ProductZimbra Collaboration Suite (ZCS)
NameSynacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability
Added to KEV2025-07-07
US federal due date2025-07-28
Ransomware useUnknown
CWECWE-918, CWE-807

CISA description

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

Other entries for this product

CVEVendor / productAddedEPSSRansomware
CVE-2026-73570Synacor Zimbra Collaboration Suite (ZCS)2026-08-2171.6%Unknown
CVE-2025-48700Synacor Zimbra Collaboration Suite (ZCS)2026-04-201.7%Unknown
CVE-2025-66376Synacor Zimbra Collaboration Suite (ZCS)2026-03-1820.2%Unknown
CVE-2025-68645Synacor Zimbra Collaboration Suite (ZCS)2026-01-2248.8%Unknown
CVE-2025-27915Synacor Zimbra Collaboration Suite (ZCS)2025-10-074.0%Unknown
CVE-2024-27443Synacor Zimbra Collaboration Suite (ZCS)2025-05-1923.6%Unknown
CVE-2023-34192Synacor Zimbra Collaboration Suite (ZCS)2025-02-2577.2%Unknown
CVE-2024-45519Synacor Zimbra Collaboration Suite (ZCS)2024-10-0399.9%Unknown
CVE-2023-37580Synacor Zimbra Collaboration Suite (ZCS)2023-07-2749.0%Unknown
CVE-2022-27926Synacor Zimbra Collaboration Suite (ZCS)2023-04-0317.6%Unknown
CVE-2022-41352Synacor Zimbra Collaboration Suite (ZCS)2022-10-2095.4%Known
CVE-2022-37042Synacor Zimbra Collaboration Suite (ZCS)2022-08-1191.8%Known
CVE-2022-27925Synacor Zimbra Collaboration Suite (ZCS)2022-08-1198.6%Known
CVE-2022-27924Synacor Zimbra Collaboration Suite (ZCS)2022-08-0493.9%Known
CVE-2018-6882Synacor Zimbra Collaboration Suite (ZCS)2022-04-1929.7%Known

NVD — CVE-2019-9621

Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page

A Synacor Zimbra Collaboration Suite (ZCS) vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2025-07-07.