CVE-2025-66280
7.2 · HIGHOverview
CVE-2025-66280 is a high-severity vulnerability affecting qnap qts. It was published on June 10, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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
Remediation
Check the references section for vendor advisories and patches from qnap. Update qts to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| qnap | qts | >= 5.2.0.2737, < 5.2.9.3410 | Affected |
| qnap | quts_hero | >= h5.2.0.2737, < h5.2.9.3410 | Affected |
Frequently Asked Questions
What is CVE-2025-66280?
CVE-2025-66280 is a high-severity vulnerability affecting qnap qts. It was published on June 10, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
How severe is CVE-2025-66280?
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-66280?
Check the references section for vendor advisories and patches from qnap. Update qts to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66280?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66280 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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