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Qsync Central CVE-2025-54170

MEDIUM
Out-of-bounds Read (CWE-125)
2026-02-11 security@qnapsecurity.com.tw
6.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK

1 technique across 1 tactic: Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS 6.5 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network.

Exploit ScenarioDerived

A remote attacker could exploit this vulnerability to compromise the affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

An out-of-bounds read vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data. [CVSS 6.5 MEDIUM]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-125 (Out-of-bounds Read). Affects Qsync Central. An out-of-bounds read vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Know when Qsync Central gets its next vulnerability

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  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

An out-of-bounds read vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Executive ViewAI

Why It Matters

Organizations using secret data. We have already fixed the vulnerability in the following should be aware of notable risk from CVE-2025-54170, a out-of-bounds read vulnerability rated CVSS 6.5. Exploitation could cause memory corruption or application crashes. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Moderate
Compensating Controls

Apply vendor patch. If patching is delayed: enable ASLR/DEP, apply network segmentation.

Threat Intelligence Overview

EPSS Score
0.0%
Top 96% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:qnap:qsync_central:*:*:*:*:*:*:*:*
CVE-2025-30276 HIGH
8.8 Feb 11

An out-of-bounds write vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user accoun

CVE-2025-29892 HIGH
8.8 Jun 06

SQL injection vulnerability in Qsync Central that allows authenticated remote attackers to execute arbitrary code or com

CVE-2025-54153 HIGH
8.6 Oct 03

SQL injection in QNAP Qsync Central 5.0.0 (all builds prior to 5.0.0.2) allows a remote attacker who already holds a val

CVE-2025-53595 HIGH
8.6 Oct 03

SQL injection in QNAP Qsync Central versions 5.0.0 through below 5.0.0.2 lets a remote attacker who already holds a vali

CVE-2025-30278 HIGH
8.3 Aug 29

An improper certificate validation vulnerability has been reported to affect Qsync Central. Rated high severity (CVSS 8.

CVE-2025-30277 HIGH
8.3 Aug 29

An improper certificate validation vulnerability has been reported to affect Qsync Central. Rated high severity (CVSS 8.

CVE-2025-52869 HIGH
8.1 Feb 11

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th

CVE-2025-52868 HIGH
8.1 Feb 11

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th

CVE-2025-48724 HIGH
8.1 Feb 11

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th

CVE-2025-48723 HIGH
8.1 Feb 11

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, th

CVE-2025-22482 HIGH
8.1 Jun 06

Format string vulnerability in QNAP Qsync Central that allows authenticated remote attackers to read sensitive data or m

CVE-2025-30269 HIGH
8.1 Feb 11

A use of externally-controlled format string vulnerability has been reported to affect Qsync Central. If a remote attack

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