CVE-2023-47565: QNAP VioStor NVR OS Command Injection Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2023-12-21
EPSS: 73.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-08 · updated 2026-06-17
Weakness: CWE-78

Description

An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network. We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later

Affected products

QNAP Qvr Firmware: from 4.0.0 before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: QNAP Qvr Firmware 5.0.0. Check the vendor advisory for mitigations.

References

https://www.qnap.com/en/security-advisory/qsa-23-48
https://www.qnap.com/en/security-advisory/qsa-23-48
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565

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