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
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| QNAP Systems | QTS | 5.2.x – < 5.2.7.3256 build 20250913 | 5.2.7.3256 build 20250913 |
| QNAP Systems | QuTS hero | h5.2.x – < h5.2.7.3256 build 20250913, h5.3.x – < h5.3.0.3192 build 20250716 | h5.2.7.3256 build 20250913 |
Advisories 1
- WID-SEC-2026-0011 QNAP NAS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 4, 2026