Qsync Central Externally-Controlled Format String Vulnerability

Vulnerability

A use of externally-controlled format string vulnerability has been identified in Qsync Central versions 5.0.x. This vulnerability allows remote attackers with user account access to exploit the issue, potentially leading to the disclosure of secret data or unauthorized memory modification.

Impact

Exploitation of this vulnerability could result in the unauthorized access to sensitive data or manipulation of memory, which may lead to further exploitation or instability within 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, 1:34 PM
Updated: Feb 11, 2026, 5:24 PM

Vulnerability Rating

Custom Algorithm
spread
6.2
impact
5.0
exploitability
4.7
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.