Detections
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Qnap QTS and QuTS hero NULL Pointer Dereference (CVE-2025-53592)

medium Tenable OT Security Plugin ID 505026

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user 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 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://www.qnap.com/en/security-advisory/qsa-25-50

Plugin Details

Severity: Medium

ID: 505026

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 1/20/2026

Updated: 1/20/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/o:qnap:qts:5.2, cpe:/o:qnap:quts_hero:h5.2, cpe:/o:qnap:quts_hero:h5.3

Required KB Items: Tenable.ot/Qnap

Patch Publication Date: 1/2/2026

Vulnerability Publication Date: 1/2/2026

Reference Information

CVE: CVE-2025-53592

CWE: 476