QNAP File Station up to 5.5.6.4933 User Account null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in QNAP File Station and classified as problematic. The affected element is an unknown function of the component User Account Handler. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2025-53408. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in QNAP File Station. Affected is an unknown code of the component User Account Handler. 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. CVE summarizes:

A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user 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: File Station 5 5.5.6.5018 and later

The weakness was shared by coral as qsa-25-38. The advisory is shared for download at qnap.com. This vulnerability is traded as CVE-2025-53408 since 06/30/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 5.5.6.5018 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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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: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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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: File Station 5.5.6.5018

Timelineinfo

06/30/2025 CVE reserved
11/07/2025 +130 days Advisory disclosed
11/07/2025 +0 days VulDB entry created
11/15/2025 +8 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-38
Researcher: coral
Status: Confirmed

CVE: CVE-2025-53408 (🔒)
GCVE (CVE): GCVE-0-2025-53408
GCVE (VulDB): GCVE-100-331524

Entryinfo

Created: 11/07/2025 17:24
Updated: 11/15/2025 08:52
Changes: 11/07/2025 17:24 (70), 11/07/2025 17:33 (2), 11/09/2025 00:18 (1), 11/15/2025 08:52 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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