CVE-2025-66274 - CVE House
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Status published Medium CVE-2025-66274

QTS, QuTS hero

Vulnerability Description

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h6.0.0.3397 build 20260206 and later

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • coral

Affected Vendor

QNAP Systems Inc.

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Affected Software

QTS, QuTS hero
Vulnerable Versions:
5.2.0, h5.2.0, h5.3.0, ?

Timeline

Official Publish: February 11th, 2026
Last Modified: June 9th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)