CVE-2025-53591
Medium
Description
A use of externally-controlled format string 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 obtain secret data or modify memory. We have already fixed the vulnerability in the following versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later
SeverityMedium
CVSS6.5
Exploit probability—
Product
Qnap Quts Hero
PublishedJan 2, 2026
First seenJan 2, 2026
Weakness typeCWE-134CWE-134
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qnap quts_hero | h5.2.0.2737, h5.2.0.2782, h5.2.0.2789, h5.2.0.2802, h5.2.0.2823, h5.2.0.2851, h5.2.0.2860, h5.2.1.2929, h5.2.1.2940, h5.2.2.2952, h5.2.3.3006, h5.2.4.3070, h5.2.4.3079, h5.2.5.3138, h5.2.6.3195, h5.3.0.3115, h5.3.0.3145, h5.3.0.3192 | — |
| qnap qts | 5.2.0.2737, 5.2.0.2744, 5.2.0.2782, 5.2.0.2802, 5.2.0.2823, 5.2.0.2851, 5.2.0.2860, 5.2.1.2930, 5.2.2.2950, 5.2.3.3006, 5.2.4.3070, 5.2.4.3079, 5.2.4.3092, 5.2.5.3145, 5.2.6.3195, 5.2.6.3229 | — |
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