QNAP NAS QTS und QuTS hero: Mehrere Schwachstellen
WID-SEC-2026-0399 · first 12.02.2026 · updated 12.02.2026 · CVSS 9,8
What it is about
QNAP ist ein Hersteller von NAS (Network Attached Storage) Lösungen. Ein entfernter, authentisierter oder anonymer Angreifer kann mehrere Schwachstellen in QNAP NAS ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen oder Daten zu manipulieren.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
- Sicherheitsmaßnahmen zu umgehen
- vertrauliche Informationen offenzulegen oder Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- QNAP NAS QTS <5.2.8.3350 build 20251216
- QNAP NAS QuTS hero <h5.2.8.3350 build 20251216
- QNAP NAS QuTS hero <h5.3.2.3354 build 20251225
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- QNAP NAS QTS 5.2.8.3350 build 20251216
- QNAP NAS QuTS hero h5.2.8.3350 build 20251216
- QNAP NAS QuTS hero h5.3.2.3354 build 20251225
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- QNAP Security Advisory vom 2026-02-11 www.qnap.com
- QNAP Security Advisory vom 2026-02-11 www.qnap.com
CVE: CVE-2025-47205, CVE-2025-58466, CVE-2025-66277, CVE-2025-59386, CVE-2025-66274, CVE-2025-48725
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.