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
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| QNAP Systems | QTS | 5.2.x – < 5.2.8.3350 build 20251216 | 5.2.8.3350 build 20251216 |
| QNAP Systems | QuTS hero | h5.3.x – < h5.3.2.3354 build 20251225, h5.2.x – < h5.2.8.3350 build 20251216 | h5.3.2.3354 build 20251225 |
Advisories 1
- WID-SEC-2026-0399 QNAP NAS QTS und QuTS hero: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 11, 2026