Description
An integer overflow or wraparound 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 compromise the security of the system.
We have already fixed the vulnerability in the following versions:
QTS 5.2.9.3410 build 20260214 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.4.3500 build 20260520 and later
QuTS hero h6.0.0.3397 build 20260206 and later
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| QNAP Systems | QTS | 5.2.0 – < 5.2.9.3410 build 20260214 | 5.2.9.3410 build 20260214 |
| QNAP Systems | QuTS hero | h5.2.0 – < h5.2.9.3410 build 20260214, h5.3.0 – < h5.3.4.3500 build 20260520, ? – < h6.0.0.3397 build 20260206 | h5.2.9.3410 build 20260214 |
Advisories 1
- WID-SEC-2026-1966 QNAP NAS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 7, 2026