CVE-2023-47565
Legacy VioStor NVR
- High 8.0
- Exploited: added to CISA KEV 21 Dec 2023
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
Key facts
- Published
- 8 Dec 2023
- Last changed
- 21 Oct 2025
- Assigned by
- qnap
- KEV added
- 21 Dec 2023
- KEV fix due
- 11 Jan 2024
- EPSS
- 73.277% likely to be exploited in the next 30 days, higher than 99.468% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.0CVSS 3.1, Highfrom the CNA (qnap)
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and laterCNA solution statement
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
CAPEC-88 OS Command Injection (CNA impact statement)
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| QNAP Systems Inc. | VioStor NVR |
|
Timeline
- 8 Dec 2023 Published
- 21 Dec 2023 CVE-2023-47565 added to CISA KEV
- 21 Dec 2023 Added to the CISA KEV catalogue
Weakness
Practice this bug class
HackZoneLabs has a hands-on lab on OS command injection (CWE-78).