High 8.0Known exploited (CISA KEV)Published Dec 8, 2023

CVE-2023-47565Legacy VioStor NVR

Updated under an hour ago (2026-10-19 10:10 UTC)

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It affects QNAP Systems Inc. VioStor NVR and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Dec 21, 2023; federal agencies had to remediate by Jan 11, 2024. Treat that date as your deadline.

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Every CVE for QNAP Systems Inc. VioStor NVR

Exploited in the last 30 days

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

CVSS: 8.0 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Added to CISA KEV Dec 21, 2023; federal remediation due Jan 11, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 73.28% (percentile 99)
Assigned by: qnap
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

QNAP Systems Inc. VioStor NVR qnap_systems:viostor_nvr (from the name)	from 4.x before 5.0.0	CNA record
qnap qvr_firmware qnap:qvr_firmware	from 4.0.0 before 5.0.0	NVD

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.