CVE-2026-41539

EUVD-2026-35350
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
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
Affected Products (NVD)
VendorProductVersion
qnapqts
5.2.0.2737:build_20240417
qnapqts
5.2.0.2744:build_20240424
qnapqts
5.2.0.2782:build_20240601
qnapqts
5.2.0.2802:build_20240620
qnapqts
5.2.0.2823:build_20240711
qnapqts
5.2.0.2851:build_20240808
qnapqts
5.2.0.2860:build_20240817
qnapqts
5.2.1.2930:build_20241025
qnapqts
5.2.2.2950:build_20241114
qnapqts
5.2.3.3006:build_20250108
qnapqts
5.2.4.3070:build_20250312
qnapqts
5.2.4.3079:build_20250321
qnapqts
5.2.4.3092:build_20250403
qnapqts
5.2.5.3145:build_20250526
qnapqts
5.2.6.3195:build_20250715
qnapqts
5.2.6.3229:build_20250818
qnapqts
5.2.7.3256:build_20250913
qnapqts
5.2.7.3297:build_20251024
qnapqts
5.2.8.3332:build_20251128
qnapqts
5.2.8.3350:build_20251216
qnapqts
5.2.8.3359:build_20251225
qnapqts
5.2.9.3410:build_20260214
qnapqts
5.2.9.3451:build_20260327
𝑥
= Vulnerable software versions