January 10, 2022 · Applied Cybernetics Group
CVE-2019-9670 — Synacor Zimbra Collaboration Suite (ZCS)
Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference
- Added to KEV
2022-01-10- Federal due date
2022-07-10- Vendor
- Synacor
- Product
- Zimbra Collaboration Suite (ZCS)
- EPSS
- 100.0th percentile (score 0.944, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-9670
CISA short description
Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.
Required action
Apply updates per vendor instructions.