CVE-2025-66279: QTS, QuTS hero
A command injection 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 execute arbitrary commands.
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
QTSto a version that resolves this vulnerability.Fixed in 5.2.9.3410 build 20260214 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h5.2.9.3410 build 20260214 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h5.3.4.3500 build 20260520 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h6.0.0.3397 build 20260206
Event History
Frequently Asked Questions
What is the severity of CVE-2025-66279?
The severity of CVE-2025-66279 is high with a CVSS score of 8.6.
How do I fix CVE-2025-66279?
To fix CVE-2025-66279, upgrade to QTS version 5.2.9.3410 or later and QuTS hero versions h5.2.9.3410 or later.
What types of devices are affected by CVE-2025-66279?
CVE-2025-66279 affects several QNAP operating system versions including QTS and QuTS hero.
What are the risks associated with CVE-2025-66279?
CVE-2025-66279 poses risks such as remote command execution by an attacker with administrator access.
When was CVE-2025-66279 published?
CVE-2025-66279 was published on June 10, 2026.