QNAP QTS 5.2.7.3256 null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in QNAP QTS 5.2.7.3256. The affected element is an unknown function. Performing a manipulation results in null pointer dereference. This vulnerability is identified as CVE-2025-53590. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in QNAP QTS 5.2.7.3256. This affects some unknown functionality. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

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: QTS 5.2.7.3256 build 20250913 and later

The weakness was released by coral as qsa-25-50. It is possible to read the advisory at qnap.com. This vulnerability is uniquely identified as CVE-2025-53590 since 07/04/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0011). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • QNAP NAS

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.8
VulDB Meta Temp Score: 3.7

VulDB Base Score: 2.7
VulDB Temp Score: 2.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.9
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/04/2025 CVE reserved
01/02/2026 +182 days Advisory disclosed
01/02/2026 +0 days VulDB entry created
01/06/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-50
Researcher: coral
Status: Confirmed

CVE: CVE-2025-53590 (🔒)
GCVE (CVE): GCVE-0-2025-53590
GCVE (VulDB): GCVE-100-339411
CERT Bund: WID-SEC-2026-0011 - QNAP NAS: Mehrere Schwachstellen

Entryinfo

Created: 01/02/2026 16:47
Updated: 01/06/2026 01:57
Changes: 01/02/2026 16:47 (69), 01/03/2026 05:30 (1), 01/05/2026 23:05 (11), 01/06/2026 01:57 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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