VulnerabilityAnalyzed
CVE-2020-7796
Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
KEVCRITICAL 9.8EPSS 84.4%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 March 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 84.42% probability · 100th percentile
- CISA KEV
- Listed 17 February 2026 · due 10 March 2026
- Weakness
- CWE-918
- Affected
- synacor/zimbra collaboration suite
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7 ; https://nvd.nist.gov/vuln/detail/CVE-2020-7796
References
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7Release Notes, Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7796US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.