CVE-2023-47565 kev in the critical feed json
Legacy VioStor NVR
published 2023-12-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-51676
- cvss
- 8.0
- version 3.1, CNA
- cisa kev
- Exploited
- added 2023-12-21
- epss
- 73.3%
- EPSS 73.3% chance of exploitation in 30 days, percentile 99.4%
- public exploits
- 0
- none known
Summary
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
Patch / fix
cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- QNAP Systems Inc. VioStor NVR 5.0.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-23-355-02 updated cvss 8.0
QNAP VioStor NVR
-
QNAP VioStor NVR QVR firmware <4.xaffected: mitigation “QNAP has provided that users should download and apply the latest QVR Firmware.” qnap.com
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Timeline
- Published
- CISA SSVC: exploitation active
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 2 y ago
- Patch by
- 2024-01-11 (2 y ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- QNAP, VioStor NVR
- CISA name
- QNAP VioStor NVR OS Command Injection Vulnerability
ATT&CK techniques
How it is exploited and what it leads to, in MITRE ATT&CK terms.
- T1203 Exploitation for Client Execution exploitation
- T1496 Resource Hijacking primary impact
- T1498 Network Denial of Service secondary impact
kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
73.28% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- QNAP Systems Inc. VioStor NVR
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
qnap.com
/en/security-advisory/qsa-23-48
vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565
government-resource, us-government-resource
Sources
- CVE List CVE-2023-47565
- NVD CVE-2023-47565
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.