CVE-2025-54146

Analyzed Analyzed - Analysis Complete

NULL Pointer Dereference in Qsync Central Enables Remote 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 Qsync Central. 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: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

CVSS Scores

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Meta Information

Published

2026-02-11

Last Modified

2026-02-12

Generated

2026-07-06

AI Q&A

2026-02-11

EPSS Evaluated

2026-07-05

NVD

CVE-2025-54146

Affected Vendors & Products

Vendor	Product	Version / Range
qnap	qsync_central	From 5.0.0.0 (inc) to 5.0.0.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability is a NULL pointer dereference issue affecting Qsync Central. It occurs when a remote attacker who has gained access to a user account exploits the flaw to cause the software to crash or become unavailable.

Essentially, the attacker triggers a condition where the program tries to access a memory location that is not properly initialized (NULL), leading to a denial-of-service (DoS) situation.

Impact Analysis

If exploited, this vulnerability can cause a denial-of-service (DoS) attack on Qsync Central, making the service unavailable or unstable.

An attacker with a user account could disrupt normal operations by crashing the application, potentially affecting availability of data synchronization services.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Qsync Central to version 5.0.0.4 or later, as the vulnerability has been fixed in this version.

Additionally, since the vulnerability can be exploited by a remote attacker who has a user account, it is advisable to review and restrict user account access to trusted users only.

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