CVE-2026-39993

Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter

Published Oct 15, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Qnap
Qnap download Station
Vendors & Products Qnap
Qnap download Station
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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
Title Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter
Weaknesses CWE-23
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
qnap
Published
Updated
Oct 15, 2026, 2:48 PM
Reserved
Apr 8, 2026, 2:30 AM
Status
Awaiting Analysis
Published
Oct 15, 2026, 7:18 AM
Modified
Oct 15, 2026, 4:32 PM