CVE-2026-41541: Symlink creation in qsyncsrv.cgi

Q: What access does an attacker need to exploit this issue?

The attacker must first obtain a user account on the affected Qsync Central system. The issue is remotely exploitable after account access is gained.

Q: Which Qsync Central releases contain the fix?

The vulnerability is fixed in Qsync Central 5.0.0.7 and later, 5.1.0.3 and later, 5.2.0.5 and later, and 5.3.0.2 and later.

Published Oct 15, 2026

Updated

An unix symbolic link (symlink) following vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.7 and later Qsync Central 5.1.0.3 and later Qsync Central 5.2.0.5 and later Qsync Central 5.3.0.2 and later

Affected Software

1 affected component

QNAP Qsync Central<5.0.0.7, <5.1.0.3, <5.2.0.5, <5.3.0.2

Event History

Oct 15, 2026

CVE Published

via MITRE·09:30 AM

Data Sourced

via MITRE·09:30 AM

RemedyDescriptionWeakness

Frequently Asked Questions

What access does an attacker need to exploit this issue?

The attacker must first obtain a user account on the affected Qsync Central system. The issue is remotely exploitable after account access is gained.

Which Qsync Central releases contain the fix?

The vulnerability is fixed in Qsync Central 5.0.0.7 and later, 5.1.0.3 and later, 5.2.0.5 and later, and 5.3.0.2 and later.