CVE-2016-9924: Synacor Zimbra Collaboration Suite

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Zimbra Collaboration Suite (ZCS) before 8.7.4 allows remote attackers to conduct XML External Entity (XXE) attacks.

Affected products

• Synacor Zimbra Collaboration Suite: up to and including 8.7.3

Published 2017-03-29. Last modified 2026-06-17.