CVE-2020-7796

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

Synacor Zimbra Collaboration SuiteApplications & CMS

CVSS

9.8Critical

ExploitationExploited in the wildAdded to KEV 17 Feb 2026CISA KEV

Exploit odds (EPSS)84.4%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS

Fixed inNone listedNo source names a fixed version yet

Federal deadline10 Mar 2026Remediation due date for US federal agenciesCISA KEV

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

What fixes it

No source in this snapshot names a fixed version.

Timeline

18 Feb 2020, 21:14 UTCPublishedCVE List
17 Feb 2026Added to CISA KEVCISA KEV

Public exploit code and templates 1

Scanner templateZimbra Collaboration Suite < 8.8.15 Patch 7 - Server-Side Request ForgeryNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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

Text from CVE List

Affected versions 1

n/aaffected: n/aCVE List