CVE-2025-59386: 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 version: QuTS hero h5.3.2.3354 build 20251225 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

https://www.qnap.com/en/security-advisory/qsa-26-08

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