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CVE-2026-41539

Cross-site scripting in Qnap Qts

CVSS score

6.1

EPSS probability

%0.3

Risk score

0.0

Published

4 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-41539 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-41539 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1qnapqts View
2qnapqts View
3qnapqts View
4qnapqts View
5qnapqts View
6qnapqts View
7qnapqts View
8qnapqts View
9qnapqts View
10qnapqts View
11qnapqts View
12qnapqts View
13qnapqts View
14qnapqts View
15qnapqts View
16qnapqts View
17qnapqts View
18qnapqts View
19qnapqts View
20qnapqts View
21qnapqts View
22qnapqts View
23qnapqts View
24qnapquts hero View
25qnapquts hero View
26qnapquts hero View
27qnapquts hero View
28qnapquts hero View
29qnapquts hero View
30qnapquts hero View
31qnapquts hero View
32qnapquts hero View
33qnapquts hero View
34qnapquts hero View
35qnapquts hero View
36qnapquts hero View
37qnapquts hero View
38qnapquts hero View
39qnapquts hero View
40qnapquts hero View
41qnapquts hero View
42qnapquts hero View
43qnapquts hero View
44qnapquts hero View
45qnapquts hero View
46qnapquts hero View
47qnapquts hero View
48qnapquts hero View
49qnapquts hero View
50qnapquts hero View
51qnapquts hero View
52qnapquts hero View
53qnapquts hero View
54qnapquts hero View
55qnapquts hero View
56qnapquts hero View
Total affected vendors: 1|Products: 56

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.3CVSS V40MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD
6.1CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-41539 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-41539 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

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

CVSS Vector Radar Chart

6.1 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityLowAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

Q
qnap logo
qnap

Weakness Type (CWE & CAPEC)

CWE-79

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