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CVE-2026-39993

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

QNAP Systems Inc. Download Station
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.36%Chance of exploitation activity in the next 30 days, higher than 28% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5.10.2.313Also 5.11.3.322CVE List
Published15 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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

Text from CVE List

Affected versions 2

  • Download Stationaffected: 5.10.x before 5.10.2.313CVE List
  • Download Stationaffected: 5.11.x before 5.11.3.322CVE List

References 1