CVE-2025-66277
Path Traversal Vulnerability in QNAP OS Allows Remote Access
Publication date: 2026-02-11
Last updated on: 2026-02-12
Assigner: QNAP Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| qnap | qts | 5.2.0.2737 |
| qnap | qts | 5.2.0.2744 |
| qnap | qts | 5.2.0.2782 |
| qnap | qts | 5.2.0.2802 |
| qnap | qts | 5.2.0.2823 |
| qnap | qts | 5.2.0.2851 |
| qnap | qts | 5.2.0.2860 |
| qnap | qts | 5.2.1.2930 |
| qnap | qts | 5.2.2.2950 |
| qnap | qts | 5.2.3.3006 |
| qnap | qts | 5.2.4.3070 |
| qnap | qts | 5.2.4.3079 |
| qnap | qts | 5.2.4.3092 |
| qnap | qts | 5.2.5.3145 |
| qnap | qts | 5.2.6.3195 |
| qnap | qts | 5.2.6.3229 |
| qnap | qts | 5.2.7.3256 |
| qnap | qts | 5.2.7.3297 |
| qnap | qts | 5.2.8.3332 |
| qnap | quts_hero | h5.2.0.2737 |
| qnap | quts_hero | h5.2.0.2782 |
| qnap | quts_hero | h5.2.0.2789 |
| qnap | quts_hero | h5.2.0.2802 |
| qnap | quts_hero | h5.2.0.2823 |
| qnap | quts_hero | h5.2.0.2851 |
| qnap | quts_hero | h5.2.0.2860 |
| qnap | quts_hero | h5.2.1.2929 |
| qnap | quts_hero | h5.2.1.2940 |
| qnap | quts_hero | h5.2.2.2952 |
| qnap | quts_hero | h5.2.3.3006 |
| qnap | quts_hero | h5.2.4.3070 |
| qnap | quts_hero | h5.2.4.3079 |
| qnap | quts_hero | h5.2.5.3138 |
| qnap | quts_hero | h5.2.6.3195 |
| qnap | quts_hero | h5.2.7.3256 |
| qnap | quts_hero | h5.2.7.3297 |
| qnap | quts_hero | h5.2.8.3321 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-59 | The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a link following issue that affects several versions of QNAP operating systems. It allows remote attackers to exploit the system by traversing the file system to access unintended locations.
How can this vulnerability impact me? :
The vulnerability can allow remote attackers to access parts of the file system that should be restricted, potentially exposing sensitive data or system files. This can lead to unauthorized information disclosure or further exploitation of the system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update your QNAP operating system to the fixed versions.
- Upgrade QTS to version 5.2.8.3350 build 20251216 or later.
- Upgrade QuTS hero to version h5.3.2.3354 build 20251225 or later.
- Upgrade QuTS hero to version h5.2.8.3350 build 20251216 or later.