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TI-2026-74710 Aliases CVE-2026-39997

Missing authentication in QNAP HybridDesk Station allows remote access

Priority MEDIUM 40CWE-306Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

QNAP HybridDesk Station from 4.2.x before 4.2.22 is affected. A missing authentication check on a critical function (CWE-306) lets unauthenticated attackers gain access to the system. The CVSS vector requires adjacent network access and passive user interaction.

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

Description from the CNA

A missing authentication for critical function vulnerability has been reported to affect HybridDesk Station. If exploited, the vulnerability could allow remote attackers to gain access to the system. We have already fixed the vulnerability in the following version: HybridDesk Station 4.2.22 and later

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00242 15th percentileScored 2026-11-07
Fix Fixed HybridDesk Station (QNAP Systems Inc.): 4.2.22

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
QNAPHybridDesk Station4.2.x to before 4.2.224.2.22Patch availableCNA
  • HybridDesk Station VendorQNAP Affected 4.2.x to before 4.2.22 Fixed in 4.2.22 Patch available CNA

Remediation

Update HybridDesk Station to version 4.2.22 or later.

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

  • Fix · CNA HybridDesk Station (QNAP Systems Inc.) Fixed in 4.2.22

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-39997
  2. 2026-10-16 Priority changed: LOW → MEDIUM

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