---
id: CVE-2026-26243
title: A path traversal vulnerability has been reported to affect Qsync Central
summary: >-
  A path traversal vulnerability has been reported to affect Qsync Central. If a
  remote attacker gains a user account, they can then exploit the vulnerability
  to read the contents of unexpected files or system data.


  We have already fixed …
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-22
vendor: QNAP Systems Inc.
product: Qsync Central
affected:
  - qsync_central >= 5.0.x < 5.0.0.6
  - qsync_central >= 5.1.x < 5.1.0.2
  - qsync_central >= 5.2.x < 5.2.0.4
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T10:17:12.770'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26243'
references:
  - url: >-
      https://www.qnap.com/en/app-release-notes?keyword=Qsync%20&app=QsyncServer&product-line=nas
    label: security@qnapsecurity.com.tw
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-15T09:59:33.291Z'
---

## Overview

A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.

We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.6 and later
Qsync Central 5.1.0.2 and later
Qsync Central 5.2.0.4 and later

## Remediation

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