What’s Vulnerable › Vulnerabilities
CVE-2025-66277: QTS, QuTS hero
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% 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-59
Description
A link following vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to traverse the file system to unintended locations. We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later
Affected products
- QNAP QTS: 5.2.0.2737-build_20240417, 5.2.0.2744-build_20240424, 5.2.0.2782-build_20240601, 5.2.0.2802-build_20240620, 5.2.0.2823-build_20240711, 5.2.0.2851-build_20240808 (+13)
- QNAP Systems Inc. QuTS hero: h5.2.0.2737-build_20240417, h5.2.0.2782-build_20240601, h5.2.0.2789-build_20240607, h5.2.0.2802-build_20240620, h5.2.0.2823-build_20240711, h5.2.0.2851-build_20240808 (+12)
References
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