CVE-2025-66277
Critical
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
SeverityCritical
CVSS9.8
Exploit probability—
Product
Qnap Quts Hero
PublishedFeb 11, 2026
First seenFeb 11, 2026
Weakness typeCWE-59Improper link resolution
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, h5.2.7.3256, h5.2.7.3297, h5.2.8.3321 | — |
| 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, 5.2.7.3256, 5.2.7.3297, 5.2.8.3332 | — |
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