CVE-2026-73574: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI) vulnerability exists in the Zimbra Classic Web Client due to improper validation of the fu request parameter. An unauthenticated attacker can exploit this vulnerability by supplying a crafted path, potentially allowing unauthorized disclosure of protected files, such as WEB-INF/web.xml, within the web application directory. This occurs in the Forward servlet.

Affected products

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

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