CVE-2023-47565

HIGH 8.0

⚠️ CISA KEV

Legacy VioStor NVR

CVSS Score

8.0

EPSS Score

0.0%

EPSS Percentile

0th

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

CWE	CWE-78
Vendor	qnap systems inc.
Product	viostor nvr
Published	Dec 8, 2023
Last Updated	Oct 21, 2025

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CVSS v3 Breakdown

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

QNAP Systems Inc. / VioStor NVR

4.x < 5.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

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