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CVE-2026-39993— Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter

Quick assessment

Affected
QNAP Systems Inc. Download Station
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

已报告发现下载中心（Download Station）存在相对路径遍历漏洞。如果远程攻击者获取了用户账户权限，便可利用此漏洞读取非预期文件的内容或系统数据。 我们已在以下版本中修复了该漏洞： 下载中心 5.10.2.313 及更高版本 下载中心 5.11.3.322 及更高版本

CVSS 8.7 · High EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 2

VendorProduct Version RangeStatus
QNAP Systems Inc. Download Station 5.10.x< 5.10.2.313 affected
5.11.x< 5.11.3.322 affected
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I. Basic Information for CVE-2026-39993

Vulnerability Information
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Vulnerability Title
Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
QNAP Systems Inc. Download Station 5.10.x ~ 5.10.2.313 -

II. Public POCs for CVE-2026-39993

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III. Intelligence Information for CVE-2026-39993

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Other References for CVE-2026-39993 (1)

Same Patch Batch · QNAP Systems Inc. · 2026-10-15 · 35 CVEs total

CVE-2026-50612 9.4 CRITICAL Import Symlink Following Remote Code Execution Vulnerability in QuMagie
CVE-2026-34006 9.3 CRITICAL Pre-Authentication Multiple Critical Vulnerabilities in QNAP sMedioDTCPServer
CVE-2026-47786 9.3 CRITICAL Pre-Authentication Command Injection
CVE-2026-50619 9.3 CRITICAL Unauthenticated remote code execution vulnerability
CVE-2026-39997 8.9 HIGH Unauthenticated Remote Input Injection in QNAP HD Station's remotepad
CVE-2026-34015 8.7 HIGH Remote Code Execution in upload.php of Video Station
CVE-2026-41544 8.7 HIGH Path Traversal leading to Arbitrary File Move, Docker Escape, and Host RCE in /calapi/rena
CVE-2026-44084 8.7 HIGH Access Code Forgery in Video Station leading to unauthorized media access
CVE-2026-53882 8.7 HIGH Path Traversal in Virtualization Station VM Import
CVE-2026-41545 8.6 HIGH WebSocket timelapse path traversal and command injection
CVE-2026-34008 8.5 HIGH **Privilege Escalation** World-writable crontab path monitored and executed by root-owned
CVE-2026-34009 8.4 HIGH **Container Escape** Host user home directory mounted with write access into application c
CVE-2026-34014 8.4 HIGH ds-move-files.sh is writable and executed as root
CVE-2025-66272 7.7 HIGH Arbitrary file deletion and remote code execution
CVE-2025-66275 7.7 HIGH Remote code execution via command injection
CVE-2025-68404 7.5 HIGH vcs_pentest Race Condition Authentication Bypass Vulnerability in QuRouter management inte
CVE-2026-26243 7.2 HIGH Arbitrary Folder Deletion in Qsync Central 5.0.0.5
CVE-2026-26244 7.1 HIGH SQLi#1 SQL Injection in class_videos.php _getFilters
CVE-2026-26245 7.1 HIGH SQLi#2 SQL Injection in class_videos.php getSmartVideosByOffset
CVE-2026-34007 6.9 MEDIUM **RCE** Unsanitized `X-Forwarded-For` header passed to `shell_exec()` via broken IP valida

Showing top 20 of 35 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Download Station
Same vendor: QNAP Systems Inc.
Same weakness: CWE-23

V. Comments for CVE-2026-39993

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