Qsync Central Uncontrolled Resource Consumption Vulnerability Allowing Denial-of-Service

Vulnerability

A vulnerability in Qsync Central versions 5.0.x has been identified, allowing for uncontrolled resource consumption. If a remote attacker with administrator access exploits this vulnerability, it can lead to a denial-of-service condition by preventing other systems, applications, or processes from accessing the same type of resource. This vulnerability has been fixed in Qsync Central version 5.2.0.1 and later.

Impact

Exploitation of this vulnerability can cause a denial-of-service condition, disrupting resource access for other systems, applications, or processes.

Remediation

Users are advised to update Qsync Central to version 5.2.0.1 or later. Instructions for updating Qsync Central are available on the QNAP website.

Added: Feb 11, 2026, 1:22 PM
Updated: Feb 11, 2026, 5:10 PM

Vulnerability Rating

Custom Algorithm
spread
6.2
impact
2.5
exploitability
4.8
remediation
7.7
relevance
3.0
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.