CVE-2020-7796
CriticalExploitedPublic exploitZimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
Published Feb 18, 2020 · Updated Jul 9, 2026
Key Facts
Patch immediately- CVE-2020-7796 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Zimbra Collaboration Suite (Synacor).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2023. Public exploit code is available.
- EPSS estimates a 84% probability of exploitation in the next 30 days.
- Fixed versions are available, including Zimbra Collaboration Suite 8.8.15.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
84%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2020-7796 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 17, 2026 | Mar 10, 2026 | Not reported |
| Industry KEV feed | Dec 12, 2023 | Mar 10, 2026 | Not reported |
| CIRCL KEV | Oct 14, 2023 | Mar 10, 2026 | Not reported |
| ENISA EUVD | Feb 17, 2026 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
8 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Zimbra Collaboration SuiteSynacor | 8.8.15, 8.8.15-p1, 8.8.15-p2, 8.8.15-p3, 8.8.15-p4, 8.8.15-p5, 8.8.15-p6 | 8.8.15 |
Patched Releases
Zimbra Collaboration Suite
8.8.15
Timeline
Publicly disclosed
Feb 18, 2020
Added to CIRCL KEV
Oct 14, 2023
Added to Industry KEV feed
Dec 12, 2023
Added to CISA KEV
Feb 17, 2026
Added to ENISA EUVD
Feb 17, 2026
Last updated
Jul 9, 2026
Weakness Type
- CWE-918 Server-Side Request Forgery (SSRF)
References
- advisoryhttps://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.
Affected: Zimbra Collaboration Suite (Synacor) versions 8.8.15, 8.8.15-p1, 8.8.15-p2, 8.8.15-p3, 8.8.15-p4, 8.8.15-p5, 8.8.15-p6. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2023.
Yes. It was added on Feb 17, 2026 with a federal remediation due date of Mar 10, 2026.
Public exploit code is available.
Fixed versions are available, including Zimbra Collaboration Suite 8.8.15.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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