Cyber Resilience

CVE-2025-68406

Path Traversal in Qnap Qsync Central 5.0.0.0 – 5.0.0.4

Published
11 February 2026
Modified
12 February 2026
Patch / advisory
CVSS Score v4 1.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0054 42th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2025-68406 is a low-severity Path Traversal (CWE-22) vulnerability in Qnap Qsync Central. Its CVSS base score is 1.3 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 42th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

A path traversal vulnerability has been reported to affect Qsync Central. 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…

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vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

CWE(s)

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
Why these techniques?

Path traversal (CWE-22) directly enables arbitrary local file reads after account compromise.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-33037Same product: Qnap Qsync Central
CVE-2025-33038Same product: Qnap Qsync Central
CVE-2025-57712Same product: Qnap Qsync Central
CVE-2025-33034Same product: Qnap Qsync Central
CVE-2025-33036Same product: Qnap Qsync Central
CVE-2025-33033Same product: Qnap Qsync Central
CVE-2025-66278Same product class: NAS / storage appliance
CVE-2026-24717Same product class: NAS / storage appliance
CVE-2026-22894Same product class: NAS / storage appliance
CVE-2025-62851Same product class: NAS / storage appliance

Affected Assets

qnap
qsync central
5.0.0.0 — 5.0.0.4

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SI-10 Information Input Validation
  • AC-3 Access Enforcement
  • AC-6 Least Privilege
Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V5.3.2

Mitigating Controls (NIST 800-53 r5) AI

prevent

Directly validates file path inputs to block traversal sequences that allow reading outside intended directories.

prevent

Enforces access control policies on file resources so authenticated users cannot read arbitrary system files.

prevent

Restricts user privileges to the minimum needed, limiting the scope of files reachable even if a traversal succeeds.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-02 partial match
prevents

Patching/maintenance can remediate known path-traversal flaws in deployed software (partial prevention of exploitability) but does nothing to stop the coding defect from being introduced in the first place.

PR.AA-05 none match
prevents

PR.AA-05 defines and reviews access policies but does not address code-level pathname neutralization, so neither direction prevents CWE-22.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

detects

Security testing in development catches path traversal via static/dynamic analysis.

prevents

Secure SDLC mandates input validation and path sanitization that directly prevent path traversal.

prevents

Application security requirements include rules for safe file handling and canonicalization.

prevents

Secure architecture principles require least-privilege file access and directory isolation.

prevents

Secure coding standards explicitly forbid unsafe path construction and mandate safe APIs.

mitigates

Information access restriction limits which files an application may read or write.

References