QNAP QTS/QuTS hero prior 5.2.6.3195 Build 20250715 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in QNAP QTS and QuTS hero. This impacts an unknown function. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2025-48726. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in QNAP QTS and QuTS hero and classified as problematic. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect 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 versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later

The weakness was shared by coral as qsa-25-36. The advisory is shared at qnap.com. This vulnerability is known as CVE-2025-48726 since 05/23/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 5.2.6.3195 Build 20250715 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-32348) and CERT Bund (WID-SEC-2025-2199). Several companies clearly confirm that VulDB is the primary source for best 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: 🔒

Upgrade: QTS/QuTS hero 5.2.6.3195 Build 20250715

Timelineinfo

05/23/2025 CVE reserved
10/03/2025 +133 days Advisory disclosed
10/03/2025 +0 days VulDB entry created
10/09/2025 +6 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-36
Researcher: coral
Status: Confirmed

CVE: CVE-2025-48726 (🔒)
GCVE (CVE): GCVE-0-2025-48726
GCVE (VulDB): GCVE-100-326929
EUVD: 🔒
CERT Bund: WID-SEC-2025-2199 - QNAP NAS QTS und QTS hero: Mehrere Schwachstellen

Entryinfo

Created: 10/03/2025 21:10
Updated: 10/09/2025 06:39
Changes: 10/03/2025 21:10 (69), 10/04/2025 12:34 (1), 10/06/2025 13:39 (7), 10/09/2025 06:39 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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