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TI-2026-74607 Aliases CVE-2026-39993GHSA-v238-v8p6-v2x6

Path traversal in QNAP Download Station exposes system files

Priority MEDIUM 40CWE-23Published · Updated

Key facts

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

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

Summary

QNAP Download Station versions from 5.10.x before 5.10.2.313 and from 5.11.x before 5.11.3.322 are affected. A relative path traversal flaw (CWE-23) lets a remote attacker who holds a user account read the contents of unexpected files and system data.

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

Description from the CNA

A relative path traversal vulnerability has been reported to affect Download Station. 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: Download Station 5.10.2.313 and later Download Station 5.11.3.322 and later

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00362 30th percentileScored 2026-11-07
Fix Fixed Download Station (QNAP Systems Inc.): 5.10.2.313, 5.11.3.322

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
QNAPDownload Station5.10.x to before 5.10.2.313; 5.11.x to before 5.11.3.3225.10.2.313, 5.11.3.322Patch availableCNA
  • Download Station VendorQNAP Affected 5.10.x to before 5.10.2.313; 5.11.x to before 5.11.3.322 Fixed in 5.10.2.313, 5.11.3.322 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:a:qnap:download_station:*:*:*:*:*:*:*:*——QNAP
  • cpe:2.3:a:qnap:download_station:*:*:*:*:*:*:*:* Versions — — ·QNAP

Remediation

Update QNAP Download Station to version 5.10.2.313 or later in the 5.10 branch, or to version 5.11.3.322 or later in the 5.11 branch.

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

  • Fix · CNA Download Station (QNAP Systems Inc.) Fixed in 5.10.2.313, 5.11.3.322

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-39993
  2. 2026-10-16 Alias added: GHSA-v238-v8p6-v2x6
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-16 Priority changed: MEDIUM → LOW
  5. 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