CVE-2025-59386

Analyzed Analyzed - Analysis Complete

NULL Pointer Dereference in QNAP OS Allows Admin-Triggered DoS

Publication date: 2026-02-11

Last updated on: 2026-02-12

Assigner: QNAP Systems, Inc.

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 version: QuTS hero h5.3.2.3354 build 20251225 and later

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-02-11

Last Modified

2026-02-12

Generated

2026-07-06

AI Q&A

2026-02-11

EPSS Evaluated

2026-07-04

NVD

CVE-2025-59386

Affected Vendors & Products

Vendor	Product	Version / Range
qnap	quts_hero	h5.3.0.3115
qnap	quts_hero	h5.3.0.3145
qnap	quts_hero	h5.3.0.3192
qnap	quts_hero	h5.3.1.3250
qnap	quts_hero	h5.3.1.3292

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade your QNAP operating system to QuTS hero version h5.3.2.3354 build 20251225 or later, where the issue has been fixed.

Executive Summary

This vulnerability is a NULL pointer dereference issue affecting several versions of the QNAP operating system. It occurs when a remote attacker who has already obtained an administrator account exploits this flaw to cause a denial-of-service (DoS) attack.

Impact Analysis

If exploited, this vulnerability allows an attacker with administrator privileges to launch a denial-of-service (DoS) attack, potentially disrupting the availability of the affected QNAP system.

Compliance Impact

I don't know

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