What is the CVSS score of CVE-2025-52869?

CVE-2025-52869 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Qsync Central are affected by CVE-2025-52869?

CVE-2025-52869 is a high-severity buffer overflow in Qsync Central that allows authenticated attackers to crash services or corrupt memory, potentially leading to data loss or system unavailability.

How to fix or mitigate CVE-2025-52869?

Within 24 hours: Inventory all Qsync Central deployments and identify exposed instances; enable audit logging for authentication and memory-related events. Within 7 days: Implement network segmentation to restrict Qsync Central access to trusted internal networks only; enforce multi-factor authentication on all user accounts. Within 30 days: Establish a vendor communication plan to track patch availability; evaluate alternative solutions or consider temporary feature disablement if exposure cannot be reduced.

Qsync Central CVE-2025-52869

HIGH

Classic Buffer Overflow (CWE-120)

2026-02-11 security@qnapsecurity.com.tw

Buffer Overflow Denial Of Service Qsync Central

8.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 11, 2026 - 13:15 nvd

HIGH 8.1

DescriptionNVD

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

AnalysisAI

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. [CVSS 8.1 HIGH]

Technical ContextAI

Classified as CWE-120 (Classic Buffer Overflow). Affects Qsync Central. 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

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

CVE-2025-52869 vulnerability details – vuln.today

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