---
id: CVE-2026-10631
title: >-
  An authorization bypass in the EWS FindItem handler of Zimbra Collaboration
  Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to
  read complete mailbox items, including raw MIME and attachments, from
  arbitrary loc…
summary: >-
  An authorization bypass in the EWS FindItem handler of Zimbra Collaboration
  Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to
  read complete mailbox items, including raw MIME and attachments, from
  arbitrary loc…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-639
vendor: Zimbra
product: Zimbra Collaboration Suite
affected:
  - collaboration_suite < 10.1.20
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T20:49:23.240'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-10631'
references:
  - url: 'https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories'
    label: cve@rapid7.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-08T16:52:14.787Z'
---

## Overview

An authorization bypass in the EWS FindItem handler of Zimbra Collaboration Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to read complete mailbox items, including raw MIME and attachments, from arbitrary local accounts without a share or delegation grant.

## Remediation

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