CVE-2020-7796

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

  • Critical 9.8
  • Exploited: added to CISA KEV 17 Feb 2026

Description

Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.

Key facts

Published
18 Feb 2020
Last changed
18 Feb 2026
Assigned by
mitre
KEV added
17 Feb 2026
KEV fix due
10 Mar 2026
EPSS
93.592% likely to be exploited in the next 30 days, higher than 99.844% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.8CVSS 3.1, Criticalfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

  • Apply 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 required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
n/an/a
  • n/a (affected)

Timeline

  1. 18 Feb 2020 Published
  2. 17 Feb 2026 CVE-2020-7796 added to CISA KEV
  3. 17 Feb 2026 Added to the CISA KEV catalogue

Weakness

Practice this bug class

HackZoneLabs has a hands-on lab on SSRF (CWE-918).

References