CVE-2025-66273: 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-2025-66273?
CVE-2025-66273 has a high severity rating of 8.6.
How do I fix CVE-2025-66273?
To fix CVE-2025-66273, upgrade to QTS 5.2.9.3410 or later, or QuTS hero h5.2.9.3410 or later.
What systems are affected by CVE-2025-66273?
CVE-2025-66273 affects several versions of QNAP QTS and QuTS hero operating systems.
What type of vulnerability is CVE-2025-66273?
CVE-2025-66273 is a command injection vulnerability.
What can an attacker do if CVE-2025-66273 is exploited?
If exploited, an attacker with administrator access can execute arbitrary commands on the affected system.