---
id: CVE-2026-73575
title: >-
  In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery
  (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of
  Zimbra Collaboration (ZCS) due to insufficient validation of request content
  types
summary: >-
  In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery
  (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of
  Zimbra Collaboration (ZCS) due to insufficient validation of request content
  types. An …
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
published: '2026-08-13'
updated: '2026-08-21'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73575'
references:
  - url: 'https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy'
    label: cve@mitre.org
  - url: 'https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00154
epssPercentile: 0.03784
ingestedAt: '2026-08-22T13:32:36.268Z'
---

## Overview

In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of Zimbra Collaboration (ZCS) due to insufficient validation of request content types. An attacker can exploit this vulnerability by causing an authenticated user to submit a crafted request, potentially allowing unauthorized actions to be performed on behalf of the victim.

## Remediation

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