CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.

Remediation Deadline: Jul 28, 2025

CVE-2019-9621

High

EPSS 94.1%CISA KEV

Synacor/Zimbra Collaboration Suite (ZCS)

Description

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

EPSS — Exploit Probability

94.1%

Higher than 99.9% of all CVEs

Required Action

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://wiki.zimbra.com/wiki/Security_Center ; https://nvd.nist.gov/vuln/detail/CVE-2019-9621

Risk Assessment

HIGH

In CISA KEV

High EPSS

Details

Severity: High
EPSS: 94.1%
CISA KEV: Yes
Ransomware: Unknown
Articles: 0

Timeline

Published

Jul 7, 2025

Added to KEV

Jul 7, 2025

Remediation Due

Jul 28, 2025

Affected Product

Synacor

Zimbra Collaboration Suite (ZCS)

View all Synacor CVEs

External Links

NVD (NIST)CVE Details MITRE CVE