QNAP VioStor NVR OS Command Injection Vulnerability
QNAP Systems Inc. — VioStor NVR
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
8.0
73.3%
Vector breakdown
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- Dec 8, 2023
- Modified
- Oct 21, 2025
- Added to KEV
- Dec 21, 2023
- Federal patch due
- Jan 11, 2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2023-47565, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2023-47565 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2023-47565?
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
How severe is CVE-2023-47565?
CVE-2023-47565 has a CVSS base score of 8.0 out of 10 (CVSS 3.1).
Is CVE-2023-47565 actively exploited in the wild?
Yes. CVE-2023-47565 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Dec 21, 2023, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2023-47565?
73.3% - meaning FIRST.org's EPSS model estimates a 73.3% probability this vulnerability will be exploited in the wild within 30 days (99% percentile among all scored CVEs).
What type of vulnerability is CVE-2023-47565?
CVE-2023-47565 is classified under CWE-78 (CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')).
Cross-checked against
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