CVE-2025-57709
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Buffer Overflow in Qsync Central Allows Memory Modification

Vulnerability report for CVE-2025-57709, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-02-11

Last updated on: 2026-02-12

Assigner: QNAP Systems, Inc.

Description

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. 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

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-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a buffer overflow issue affecting Qsync Central. It allows a remote attacker who has gained access to a user account to exploit the vulnerability to modify memory or cause processes to crash.

Impact Analysis

If exploited, this vulnerability can allow an attacker to alter memory contents or crash processes on the affected system. This could lead to instability, denial of service, or potentially unauthorized actions depending on the memory modifications.

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.

Additionally, ensure that remote attackers cannot gain user accounts, as exploitation requires a valid user account.

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