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
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 2 products from qnap, from qnap organizations running these solutions should prioritize assessment and patching.
Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2026-06-09T06:16:53.413
2026-06-12T15:37:43.163
Analyzed
CVSSv3.1: 6.1 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | qnap | qts | 5.2.0.2737 | Yes |
| Operating System | qnap | qts | 5.2.0.2744 | Yes |
| Operating System | qnap | qts | 5.2.0.2782 | Yes |
| Operating System | qnap | qts | 5.2.0.2802 | Yes |
| Operating System | qnap | qts | 5.2.0.2823 | Yes |
| Operating System | qnap | qts | 5.2.0.2851 | Yes |
| Operating System | qnap | qts | 5.2.0.2860 | Yes |
| Operating System | qnap | qts | 5.2.1.2930 | Yes |
| Operating System | qnap | qts | 5.2.2.2950 | Yes |
| Operating System | qnap | qts | 5.2.3.3006 | Yes |
| Operating System | qnap | qts | 5.2.4.3070 | Yes |
| Operating System | qnap | qts | 5.2.4.3079 | Yes |
| Operating System | qnap | qts | 5.2.4.3092 | Yes |
| Operating System | qnap | qts | 5.2.5.3145 | Yes |
| Operating System | qnap | qts | 5.2.6.3195 | Yes |
| Operating System | qnap | qts | 5.2.6.3229 | Yes |
| Operating System | qnap | qts | 5.2.7.3256 | Yes |
| Operating System | qnap | qts | 5.2.7.3297 | Yes |
| Operating System | qnap | qts | 5.2.8.3332 | Yes |
| Operating System | qnap | qts | 5.2.8.3350 | Yes |
| Operating System | qnap | qts | 5.2.8.3359 | Yes |
| Operating System | qnap | qts | 5.2.9.3410 | Yes |
| Operating System | qnap | qts | 5.2.9.3451 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2737 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2782 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2789 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2802 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2823 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2851 | Yes |
| Operating System | qnap | quts_hero | h5.2.0.2860 | Yes |
| Operating System | qnap | quts_hero | h5.2.1.2929 | Yes |
| Operating System | qnap | quts_hero | h5.2.1.2940 | Yes |
| Operating System | qnap | quts_hero | h5.2.2.2952 | Yes |
| Operating System | qnap | quts_hero | h5.2.3.3006 | Yes |
| Operating System | qnap | quts_hero | h5.2.4.3070 | Yes |
| Operating System | qnap | quts_hero | h5.2.4.3079 | Yes |
| Operating System | qnap | quts_hero | h5.2.5.3138 | Yes |
| Operating System | qnap | quts_hero | h5.2.6.3195 | Yes |
| Operating System | qnap | quts_hero | h5.2.7.3256 | Yes |
| Operating System | qnap | quts_hero | h5.2.7.3297 | Yes |
| Operating System | qnap | quts_hero | h5.2.8.3321 | Yes |
| Operating System | qnap | quts_hero | h5.2.8.3350 | Yes |
| Operating System | qnap | quts_hero | h5.2.8.3359 | Yes |
| Operating System | qnap | quts_hero | h5.2.9.3410 | Yes |
| Operating System | qnap | quts_hero | h5.2.9.3492 | Yes |
| Operating System | qnap | quts_hero | h5.3.0.3115 | Yes |
| Operating System | qnap | quts_hero | h5.3.0.3145 | Yes |
| Operating System | qnap | quts_hero | h5.3.0.3192 | Yes |
| Operating System | qnap | quts_hero | h5.3.1.3250 | Yes |
| Operating System | qnap | quts_hero | h5.3.1.3292 | Yes |
| Operating System | qnap | quts_hero | h5.3.2.3354 | Yes |
| Operating System | qnap | quts_hero | h5.3.3.3424 | Yes |
| Operating System | qnap | quts_hero | h6.0.0.3324 | Yes |
| Operating System | qnap | quts_hero | h6.0.0.3382 | Yes |
| Operating System | qnap | quts_hero | h6.0.0.3397 | Yes |
| Operating System | qnap | quts_hero | h6.0.0.3459 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For qnap's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.