---
title: "CVE-2023-47565: QNAP VioStor NVR OS Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-47565/
description: "CVE-2023-47565 (QNAP VioStor NVR): Exploited in the wild (CISA KEV). An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR…"
type: vulnerability-record
section: "Security Digest"
date_published: 2023-12-08
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-47565"
kev: true
cvss: 8
epss: 0.73277
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run QNAP VioStor NVR. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2023-12-21, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-01-11 ; treat that as the outer limit, not the target.
- EPSS 73.3% , percentile 99: FIRST’s model estimates a 73.3% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.

## What it is

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 (CVE record)

- QNAP Systems Inc. VioStor NVR: 4.x < 5.0.0

## Severity

- qnap CVSS 3.1: 8 `CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2023-12-21; federal due date 2024-01-11. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 73.28% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [Listed in CISA KEV notes (qnap.com)](https://www.qnap.com/en/security-advisory/qsa-23-48)
- [CVE.org record CVE-2023-47565](https://www.cve.org/CVERecord?id=CVE-2023-47565)
- [NVD entry CVE-2023-47565](https://nvd.nist.gov/vuln/detail/CVE-2023-47565)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565)

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Source page: https://erroneo.us/security/cve/CVE-2023-47565/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt