CVE-2026-73572

In Zimbra Collaboration ZCS before 10.1.17, a stored cross-site scripting XSS vulnerability exists in the Zimbra Classic Web Client due to insufficient sanitization of specific attachment content during inline preview. An attacker can send a crafted email containing a malicious attachment that,...

CVE-2026-73575

In Zimbra Collaboration ZCS before 10.1.17, a Cross-Site Request Forgery CSRF vulnerability exists in the Exchange Web Services EWS endpoint of Zimbra Collaboration ZCS due to insufficient validation of request content types. An attacker can exploit this vulnerability by causing an authenticated...

CVE-2026-73571

An authorization bypass vulnerability exists in Zimbra Collaboration ZCS before 10.1.17 due to improper authorization validation in delegated email sending functionality. An authenticated attacker can send specially crafted SOAP requests to impersonate another user and send emails without...