---
id: CVE-2026-73574
title: >-
  In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI)
  vulnerability exists in the Zimbra Classic Web Client due to improper
  validation of the fu request parameter
summary: >-
  In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI)
  vulnerability exists in the Zimbra Classic Web Client due to improper
  validation of the fu request parameter. An unauthenticated attacker can
  exploit this vulnerability…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-669
published: '2026-08-13'
updated: '2026-08-21'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73574'
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: 0.00327
epssPercentile: 0.22991
ingestedAt: '2026-08-22T13:32:36.232Z'
---

## Overview

In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI) vulnerability exists in the Zimbra Classic Web Client due to improper validation of the fu request parameter. An unauthenticated attacker can exploit this vulnerability by supplying a crafted path, potentially allowing unauthorized disclosure of protected files, such as WEB-INF/web.xml, within the web application directory. This occurs in the Forward servlet.

## Remediation

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