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TI-2025-43921 Aliases CVE-2025-68404GHSA-fggx-7qgp-qrc8

Race condition in QNAP QuRouter management interface allows remote compromise

Priority LOW 34CWE-367Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A time-of-check time-of-use race condition (CWE-367) in QNAP QuRouter lets remote attackers compromise the security of the system. The affected versions are from 2.6.x before 2.6.4.001. The CVSS 4.0 vector shows that the attack is remote and requires user interaction with no privileges, with high impact on confidentiality, integrity and availability of the vulnerable system.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00151 4th percentileScored 2026-11-07
Fix Fixed QuRouter (QNAP Systems Inc.): 2.6.4.001

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
QNAPQuRouter2.6.x to before 2.6.4.0012.6.4.001Patch availableCNA
  • QuRouter VendorQNAP Affected 2.6.x to before 2.6.4.001 Fixed in 2.6.4.001 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:qnap:qurouter:*:*:*:*:*:*:*:*——QNAP
  • cpe:2.3:o:qnap:qurouter:*:*:*:*:*:*:*:* Versions — — ·QNAP

Remediation

Update QuRouter to version 2.6.4.001 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA QuRouter (QNAP Systems Inc.) Fixed in 2.6.4.001

Timeline

  1. 2026-10-15 Threatist record created from CVE-2025-68404
  2. 2026-10-16 Alias added: GHSA-fggx-7qgp-qrc8
  3. 2026-10-16 CVSS score changed · CNA
  4. 2026-10-16 CISA SSVC decision points changed

References

Other 1

  • TI-2022-10581 DeadBolt Ransomware KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-09791 Improper Authorization Vulnerability in HBS 3 (Hybrid Backup Sync) KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05103 Path traversal in QNAP NAS devices running Photo Station KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05102 Path traversal in QNAP NAS devices running Photo Station KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
See all 681 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences