High severity · published Oct 15, 2026
CVE-2026-39993
Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter
8.7
CVSS
0.4%
EPSS
No
On KEV
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
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DS
Download Station · QNAP Systems Inc.
5.10.x before 5.10.2.313; 5.11.x before 5.11.3.322 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39993
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39993
www.qnap.com
https://www.qnap.com/en/app_releasenotes/list.php?app_choose=DownloadStation
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