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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0076
Vulnerability in QNAP NAS

Original Issue Date:February 06, 2026

Severity Rating: HIGH

Software Affected

  • QNAP QTS 4.3.x.

Overview

A vulnerability has been reported in QNAP product, which could allow a remote attacker to bypass security restrictions on the targeted system.

Target Audience:
Organizations and Individuals using affected QNAP devices and applications.

Risk Assessment:
Risk of unauthorized access or actions.

Impact Assessment:
Exposure of sensitive data or information.

Description

QNAP QTS is a network-attached storage (NAS) operating system widely used for file sharing, data backup, and multimedia services.

This vulnerability exist in QNAP due to misconfiguration of NFS (Network File System) settings that may allow a remote attacker to perform actions and potentially gain access to the targeted system.

Successful exploitation of this vulnerability could allow a remote attacker to bypass security restrictions on the targeted system.

Solution

Apply appropriate updates as mentioned by the vendor:
https://www.qnap.com/en/security-advisory/qsa-25-56

Vendor Information

QNAP
https://www.qnap.com/en/security-advisory/qsa-25-56

References

QNAP
https://www.qnap.com/en/security-advisory/qsa-25-56

CVE Name
CVE-2025-66276

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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