CVE-2025-58466: QNAP QTS

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

A use of uninitialized variable 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 denial of service conditions, or modify control flow in unexpected ways. We have already fixed the vulnerability in the following versions: QTS 5.2.8.3332 build 20251128 and later QuTS hero h5.2.8.3321 build 20251117 and later

Affected products

• QNAP QTS: version 5.2.0.2737 only; version 5.2.0.2744 only; version 5.2.0.2782 only; version 5.2.0.2802 only; version 5.2.0.2823 only; version 5.2.0.2851 only; …
• QNAP Quts Hero: version h5.2.0.2737 only; version h5.2.0.2782 only; version h5.2.0.2789 only; version h5.2.0.2802 only; version h5.2.0.2823 only; version h5.2.0.2851 only; …

Published 2026-02-11. Last modified 2026-06-17.