Is CVE-2023-47565 in the CISA KEV catalog?

Yes. CVE-2023-47565 is on the CISA Known Exploited Vulnerabilities list, added 2023-12-21.

What is the CVSS severity of CVE-2023-47565?

CVE-2023-47565 has a CVSS v3 base score of 8.0 (HIGH).

What is the EPSS score for CVE-2023-47565?

CVE-2023-47565 has an EPSS score of 73.28% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2023-47565

HIGHCISA KEVEPSS 99th pctl

8.0

CVSS v3

NVD

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

CWE-78OS Command Injection

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

73.28%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

QNAP VioStor NVR OS Command Injection Vulnerability

QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network.

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

Remediation due: 2024-01-11

References

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-26.