Live › vulnerability › CVE-2026-93636
Go to dashboardAn authenticated Zimbra Collaboration Suite user can inject LDAP filter conditions through the attribute names in SearchCalendarResourcesRequest. Repeated matching queries let them recover readable calendar resource attributes such as internal mailbox hostnames and mail transport routes.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Zimbra Collaboration Suite deployments on the affected versions are exposed, and the attacker needs a valid user account on the server. Sites that run no ZCS, or that run a version outside the listed affected releases, can skip it. The sources do not say whether managed hosting changes exposure.
No product ranges from the sources yet.
su - zimbra -c "zmcontrol -v"; versions 10.1.16 and 10.1.21 are affected.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
An LDAP filter injection vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user to query otherwise unreturned attributes of calendar resources through SearchCalendarResourcesRequest. Zimbra escapes search values but inserts the supplied attribute names directly into LDAP filter expressions without validation. An attacker can inject additional conditions and use repeated matching queries to recover readable resource attributes such as internal mailbox hostnames and mail transport routes. The search remains restricted to calendar-resource objects and the LDAP service account's access rights. ZCS 10.1.16 and 10.1.21 are affected.
This page as .md · .json · in your agent: get_signal("CVE-2026-93636")
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