---
id: CVE-2026-93643
title: "When OnlyOffice/Document Editing is available, an unauthenticated remote attacker with access to an existing supported public Briefcase document can abuse unsigned\_save\_fields to perform path-traversal writes and execute commands as\_zimbra."
summary: "When OnlyOffice/Document Editing is available, an unauthenticated remote attacker with access to an existing supported public Briefcase document can abuse unsigned\_save\_fields to perform path-traversal writes and execute commands as\_zimbra."
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
  - CWE-863
vendor: Zimbra
product: Zimbra Collaboration Suite (ZCS)
affected:
  - collaboration_suite_zcs < 10.1.21
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:17:19.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93643'
references:
  - url: 'https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories'
    label: cve@rapid7.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-25T16:09:45.670290Z'
ingestedAt: '2026-09-25T14:09:46.366Z'
---

## Overview

When OnlyOffice/Document Editing is available, an unauthenticated remote attacker with access to an existing supported public Briefcase document can abuse unsigned save fields to perform path-traversal writes and execute commands as zimbra.

## Remediation

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