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OpenAdvisories
Medium · 6.3 CVE-2026-41539 EUVD-2026-35350GHSA-hc5c-8r54-29r3

QTS, QuTS hero

Published Jun 9, 2026 · Updated Oct 19, 2026 · Assigned by qnap

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

Affected products

VendorProductAffectedFixed
QNAP Systems QTS 5.2.0 – < 5.2.9.3492 build 20260507 5.2.9.3492 build 20260507
QNAP Systems QuTS hero h5.2.0 – < h5.2.9.3499 build 20260514, h5.3.0 – < h5.3.4.3500 build 20260520, ? – < h6.0.0.3500 build 20260520 h5.2.9.3499 build 20260514

References