---
id: CVE-2026-93635
title: >-
  LDAP filter injection in Zimbra Collaboration Suite 10.1.0 through 10.1.21
  allows unauthenticated attackers to alter external LDAP search filters
summary: >-
  LDAP filter injection in Zimbra Collaboration Suite 10.1.0 through 10.1.21
  allows unauthenticated attackers to alter external LDAP search filters. On
  domains using search-filter authentication and lazy provisioning, this creates
  a passwo…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-90
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:20:21.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93635'
references:
  - url: >-
      https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1
    label: cve@rapid7.com
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.680Z'
---

## Overview

LDAP filter injection in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to alter external LDAP search filters. On domains using search-filter authentication and lazy provisioning, this creates a password oracle for external directory users. Authenticated S/MIME lookups can also return certificates and identity data for unintended directory entries.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.