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

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

cat cve-2020-7796.json

Vendor: Synacor
Product: Zimbra Collaboration Suite
CVSS: 9.8
EPSS (exploit probability): 84.4%
Status: kev
CISA patch-by (BOD 22-01): March 10, 2026
Published: February 17, 2026
Source: https://nvd.nist.gov/vuln/detail/CVE-2020-7796

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

Added to CISA’s Known Exploited Vulnerabilities catalog on 2026-02-17. Required action per CISA: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Due date: 2026-03-10.

This is an auto-synced KEV catalog record pending a full 0dayNews write-up — see CISA’s KEV catalog and the NVD record linked above for primary sources.