Main Vulnerability Database Vulnerabilities #VU134933

OS Command Injection in QNAP Systems, Inc. products - CVE-2025-66273

Published: June 19, 2026

Vulnerability identifier: #VU134933

CSH Severity: Low

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-66273

CWE-ID: CWE-78

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the username parameter. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

QuTScloud
QuTS hero
QVP (QVR Pro appliances)
QNAP QTS

How to mitigate CVE-2025-66273

Install updates from vendor's website.

QuTScloud - update to
QuTScloud - update to c5.2.9
QuTS hero - update to h5.2.9
QVP (QVR Pro appliances) - update to 2.8.0
QNAP QTS - update to 5.2.10

External References

https://www.qnap.com/en/security-advisory/qsa-26-10

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