PT-2026-47687 · Qnap Systems · Qts+1

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-41539

Mitre

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-41539

Affected Products

Qts

Quts Hero

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-41539 · Security Note
• https://qnap.com/en/security-advisory/qsa-26-31 · Note