# CVE-2023-47565: Legacy VioStor NVR

> CVE-2023-47565: Legacy VioStor NVR. CVSS 8.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-47565
Last updated: 2025-10-21T23:05:29Z

- Published: 2023-12-08 16:06 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: qnap
- CVSS: 8.0 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 73.3%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-12-21, federal due date 2024-01-11, ransomware use: Unknown
- CWE: 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

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- QNAP Systems Inc.: VioStor NVR

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-47565)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-47565)
- [https://www.qnap.com/en/security-advisory/qsa-23-48](https://www.qnap.com/en/security-advisory/qsa-23-48)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-47565 · Markdown: https://rewindex.com/cve/CVE-2023-47565.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-47565 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:01:37.168Z