CVE-2026-73573: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

In Zimbra Collaboration (ZCS) before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase document editing functionality due to improper validation of the packages parameter. An authenticated attacker can exploit this vulnerability by supplying a crafted path traversal sequence, potentially allowing unauthorized disclosure of sensitive files within the web application directory.

Affected products

• Synacor Zimbra Collaboration Suite: before 10.1.17 (fixed in 10.1.17)

Published 2026-08-13. Last modified 2026-08-28.