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CVE-2026-93636

4.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 9

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-28 21:15
  2. StatusPublished → AnalyzedNVD modified 2026-10-28 21:15
  3. StatusUndergoing Analysis → PublishedNVD modified 2026-10-28 19:50
  4. StatusPublished → Undergoing AnalysisNVD modified 2026-10-28 20:18
  5. StatusAwaiting Analysis → PublishedNVD modified 2026-10-23 13:27
  6. StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 16:44
  7. StatusReceived → PublishedNVD modified 2026-10-23 13:27
  8. StatusPublished → ReceivedNVD modified 2026-10-23 14:17
  9. First seenCVSS 4.3 · zimbraNVD modified 2026-10-23 13:27

Affected (CPE criteria) 1

  • cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

References 2