CVE-2026-41541 PUBLISHED

Symlink creation in qsyncsrv.cgi

Assigner: qnap
Reserved: 21.04.2026 Published: 15.10.2026 Updated: 15.10.2026

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

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	QNAP Systems Inc.
Product	Qsync Central
Versions	Default: unaffected affected from 5.0.x to 5.0.0.7 (excl.) affected from 5.1.x to 5.1.0.3 (excl.) affected from 5.2.x to 5.2.0.5 (excl.) affected from 5.3.x to 5.3.0.2 (excl.)

Solutions

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

Credits

Jun Rong finder

References

https://www.qnap.com/en/app-release-notes?keyword=Qsync%20&app=QsyncServer&product-line=nas

Problem Types

CWE-61 CWE

Impacts

CAPEC-132