Qsync Central NULL Pointer Dereference Vulnerability Leading to Denial-of-Service

Vulnerability

A NULL pointer dereference vulnerability has been identified in Qsync Central versions 5.0.x. This vulnerability allows remote attackers with administrator access to exploit the issue, resulting in a denial-of-service (DoS) condition.

Impact

Exploitation of this vulnerability causes a denial-of-service condition, disrupting the normal functioning of the application.

Remediation

Users are advised to update Qsync Central to version 5.0.0.4 or later. Instructions for updating Qsync Central are available on the QNAP website.

Added: Feb 11, 2026, 1:21 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
2.7
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.