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
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Meta Information
Published
2026-02-11
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-02-11
EPSS Evaluated
2026-06-14
NVD
CVE-2025-59386
Affected Vendors & Products
Showing 5 associated CPEs
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
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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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.

Detection Guidance

I don't know

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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