CVE-2025-52863
High
Description
A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. 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 h5.3.0.3192 build 20250716 and later
SeverityHigh
CVSS8.1
Exploit probability—
Product
Qnap Quts Hero
PublishedJan 2, 2026
First seenJan 2, 2026
Weakness typeCWE-120CWE-120
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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