CVE-2025-53598
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
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Meta Information
Published
2026-02-11
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-02-11
EPSS Evaluated
2026-06-15
NVD
CVE-2025-53598
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
qnap qsync_central From 5.0.0.0 (inc) to 5.0.0.4 (exc)
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 Qsync Central. It occurs when a remote attacker who has gained access to a user account exploits this flaw to cause the application to crash or become unavailable.

Essentially, the attacker can trigger a denial-of-service (DoS) attack by exploiting this vulnerability.

Impact Analysis

If exploited, this vulnerability can lead to a denial-of-service (DoS) condition, making the Qsync Central service unavailable or unstable.

This means legitimate users may be unable to access or use the service while the attack is ongoing.

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 starting from this version.

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