---
id: CVE-2025-68404
title: >-
  A time-of-check time-of-use (toctou) race condition vulnerability has been
  reported to affect QuRouter
summary: >-
  A time-of-check time-of-use (toctou) race condition vulnerability has been
  reported to affect QuRouter. If exploited, the vulnerability could allow
  remote attackers to compromise the security of the system.


  We have already fixed the vul…
severity: high
cvss: 7.5
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-367
vendor: QNAP Systems Inc.
product: QuRouter
affected:
  - QuRouter >= 2.6.x < 2.6.4.001
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:10.647'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68404'
references:
  - url: 'https://www.qnap.com/en/release-notes/qurouter/overview/2.7'
    label: security@qnapsecurity.com.tw
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T18:31:57.590370Z'
cvssSource: cna
ingestedAt: '2026-10-15T07:57:27.841Z'
epss: 0.00151
epssPercentile: 0.04164
---

## Overview

A time-of-check time-of-use (toctou) race condition vulnerability has been reported to affect QuRouter. If exploited, the vulnerability could allow remote attackers to compromise the security of the system.

We have already fixed the vulnerability in the following version:
QuRouter 2.6.4.001 and later

## Remediation

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