CVE-2026-41539

QTS, QuTS hero

State: Published
Severity: 6.3 Medium
Published: Jun 9, 2026
Updated: Oct 19, 2026
Reserved: Apr 21, 2026

Description

A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data.

We have already fixed the vulnerability in the following versions: QTS 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3500 build 20260520 and later

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U	qnap

Weaknesses

CWE-79

Affected Products

Product	Versions
QTSQNAP Systems Inc.	5.2.0 to before 5.2.9.3492 build 20260507Affected
QuTS heroQNAP Systems Inc.	h5.2.0 to before h5.2.9.3499 build 20260514Affected h5.3.0 to before h5.3.4.3500 build 20260520Affected ? to before h6.0.0.3500 build 20260520Affected

References

https://www.qnap.com/en/security-advisory/qsa-26-10

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