What is CVE-2025-66279?

CVE-2025-66279 is a high-severity vulnerability in Qnap Qts, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-06-10.

How severe is CVE-2025-66279?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Qnap Qts

CVE-2025-66279

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 alre…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.010 (60.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qnap Qts
Qnap Quts_hero
Qnap Systems Inc. Qts — versions 5.2.0
Qnap Systems Inc. Quts Hero — versions h5.2.0, h5.3.0, ?

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security@qnapsecurity.com.tw (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2025-66279?: CVE-2025-66279 is a high-severity vulnerability in Qnap Qts, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-06-10.
How severe is CVE-2025-66279?: High severity. CVSS v3 base score is 7.2 out of 10.