CVE-2025-47205
Undergoing Analysis Undergoing Analysis - In Progress
NULL Pointer Dereference in QNAP OS Allows Admin-Triggered DoS

Publication date: 2026-02-11

Last updated on: 2026-02-27

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 versions: QTS 5.2.8.3332 build 20251128 and later QuTS hero h5.2.8.3321 build 20251117 and later
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Meta Information
Published
2026-02-11
Last Modified
2026-02-27
Generated
2026-06-16
AI Q&A
2026-02-11
EPSS Evaluated
2026-06-14
NVD
CVE-2025-47205
EUVD
EUVD-2025-207452
Affected Vendors & Products
Showing 35 associated CPEs
Vendor Product Version / Range
qnap qts 5.2.0.2737
qnap qts 5.2.0.2744
qnap qts 5.2.0.2782
qnap qts 5.2.0.2802
qnap qts 5.2.0.2823
qnap qts 5.2.0.2851
qnap qts 5.2.0.2860
qnap qts 5.2.1.2930
qnap qts 5.2.2.2950
qnap qts 5.2.3.3006
qnap qts 5.2.4.3070
qnap qts 5.2.4.3079
qnap qts 5.2.4.3092
qnap qts 5.2.5.3145
qnap qts 5.2.6.3195
qnap qts 5.2.6.3229
qnap qts 5.2.7.3256
qnap qts 5.2.7.3297
qnap quts_hero h5.2.0.2737
qnap quts_hero h5.2.0.2782
qnap quts_hero h5.2.0.2789
qnap quts_hero h5.2.0.2802
qnap quts_hero h5.2.0.2823
qnap quts_hero h5.2.0.2851
qnap quts_hero h5.2.0.2860
qnap quts_hero h5.2.1.2929
qnap quts_hero h5.2.1.2940
qnap quts_hero h5.2.2.2952
qnap quts_hero h5.2.3.3006
qnap quts_hero h5.2.4.3070
qnap quts_hero h5.2.4.3079
qnap quts_hero h5.2.5.3138
qnap quts_hero h5.2.6.3195
qnap quts_hero h5.2.7.3256
qnap quts_hero h5.2.7.3297
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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Executive Summary

This vulnerability is a NULL pointer dereference issue affecting several versions of the QNAP operating system. It allows a remote attacker who already has an administrator account to exploit the vulnerability and cause a denial-of-service (DoS) attack.

Impact Analysis

If exploited, this vulnerability can lead to a denial-of-service (DoS) condition, which means the affected QNAP system could become unavailable or unresponsive, disrupting normal operations.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should update your QNAP operating system to the fixed versions.

  • For QTS, update to version 5.2.8.3332 build 20251128 or later.
  • For QuTS hero, update to version h5.2.8.3321 build 20251117 or later.

Since exploitation requires an attacker to have an administrator account, ensure that administrator credentials are secure and monitor for unauthorized access.

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