CVE-2025-66280: QTS, QuTS hero
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 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-2025-66280?
CVE-2025-66280 has a medium severity rating of 5.1 on the CVSS scale.
What systems are affected by CVE-2025-66280?
CVE-2025-66280 affects several versions of QNAP operating systems, specifically QTS and QuTS hero.
How do I fix CVE-2025-66280?
To resolve CVE-2025-66280, update to QTS version 5.2.9.3410 or later, or QuTS hero version h5.2.9.3410 or later.
What kind of vulnerability is CVE-2025-66280?
CVE-2025-66280 is classified as an integer overflow or wraparound vulnerability.
What can an attacker do if they exploit CVE-2025-66280?
If successfully exploited, an attacker with an administrator account can compromise the security of the affected system.