CVE-2026-93639 Zimbra Collaboration Suite Missing Authorization in ConfigureZimlet Enables Delegated Administrator Privilege Escalation

A missing authorization vulnerability in Zimbra Collaboration Suite ZCS allows a delegated administrator with no explicit administrative grants to overwrite global Zimlet configuration through ConfigureZimletRequest. The uploaded configuration can also add an attacker-controlled domain to the pro...

CVE-2026-93639

A missing authorization vulnerability in Zimbra Collaboration Suite (ZCS) versions 10.1.16 and 10.1.20 allows a delegated administrator to overwrite global Zimlet configurations via ConfigureZimletRequest without explicit administrative grants. An attacker can leverage this to add a controlled do...