How severe is CVE-2023-47565?

CVE-2023-47565 has a CVSS 3.1 base score of 8 (HIGH). EPSS estimates a 73.3% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2023-47565: Legacy VioStor NVR

CISA Known Exploited Vulnerabilities

QNAP VioStor NVR OS Command Injection Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2023-12-21

Remediation due

2024-01-11

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

CISA notes
https://www.qnap.com/en/security-advisory/qsa-23-48 ; https://nvd.nist.gov/vuln/detail/CVE-2023-47565

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

Severity

CVSS 3.1 · CNA8 HIGH

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 14, 2026

All KEV statistics→

CISA added CVE-2023-47565 to the KEV catalog 13 days after its CVE record was published. The median for entries added in 2023 is 12 days.
It is one of 12 QNAP entries in the CISA KEV catalog, and the only one added in 2023.
Its current EPSS score (73.3%) is higher than that of 59% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
QNAP Systems Inc.	QNAP Systems Inc. VioStor NVR	4.x to <5.0.0

References

1 Links

Other references

https://www.qnap.com/en/security-advisory/qsa-23-48

Record Details

Published

2023-12-08

Last updated

2025-10-21

Assigner (CNA)

qnap

Credited to

Chad Seaman and Larry Cashdollar of Akamai Technologies reported this vulnerability to CISA

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Tool categories

Application Security Tools Penetration Testing Tools

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.

CVE-2023-47565