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

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
QNAP Systems Inc. QTS unaffected
Version Status Constraints
5.2.0 affected < 5.2.9.3492 build 20260507
QNAP Systems Inc. QuTS hero unaffected
Version Status Constraints
h5.2.0 affected < h5.2.9.3499 build 20260514
h5.3.0 affected < h5.3.4.3500 build 20260520
? affected < h6.0.0.3500 build 20260520

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Qnap Systems Inc. Subscribe
Qts Subscribe
Quts Hero Subscribe

Project Subscriptions

Vendors Products
Qnap Systems Inc. Subscribe
Qts Subscribe
Quts Hero Subscribe
Advisories

No advisories yet.

Fixes

Solution

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

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.qnap.com/en/security-advisory/qsa-26-31 cve-icon cve-icon
History

Tue, 09 Jun 2026 07:45:00 +0000

Type Values Removed Values Added
First Time appeared Qnap Systems Inc.
Qnap Systems Inc. qts
Qnap Systems Inc. quts Hero
Vendors & Products Qnap Systems Inc.
Qnap Systems Inc. qts
Qnap Systems Inc. quts Hero

Tue, 09 Jun 2026 06:15:00 +0000

Type Values Removed Values Added
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
Title QTS, QuTS hero
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: qnap

Published:

Updated: 2026-06-09T05:51:37.054Z

Reserved: 2026-04-21T03:07:17.287Z

Link: CVE-2026-41539

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-09T06:16:53.413

Modified: 2026-06-09T06:16:53.413

Link: CVE-2026-41539

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-09T08:00:15Z

Weaknesses