What’s Vulnerable › Vulnerabilities
CVE-2025-66274: QTS, QuTS hero
- Severity: medium (CVSS 4.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-11 · updated 2026-06-17
- Weakness: CWE-476
Description
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h6.0.0.3397 build 20260206 and later
Affected products
- QNAP Systems Inc. QuTS hero: h5.3.0.3115-build_20250430, h5.3.0.3145-build_20250530, h5.3.0.3192-build_20250716, h5.3.1.3250-build_20250912, h5.3.1.3292-build_20251024
References
Get alerted when CVE-2025-66274 or the next vulnerability affects your stack