CVE-2023-47565: QNAP VioStor NVR OS Command Injection Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 13 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 73.3%
EPSS score, percentile 99.5 of all scored records
- How severe?
- 8.0 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline . Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from 4.x to before 5.0.0
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: .
Solution (from the CVE record)
We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 4.x to before 5.0.0 |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2023-47565 to its Known Exploited Vulnerabilities (KEV) catalog on 21 Dec 2023.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 11 Jan 2024.
- The CVE record was published on 8 Dec 2023, 13 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 8.0 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 73.3% (percentile 99.5), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
Legacy VioStor NVR
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
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Attack patterns (CAPEC)
- CAPEC-88: OS Command Injection
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record last updated |
References
More exploited QNAP vulnerabilities
- CVE-2022-27593: QNAP Photo Station Externally Controlled Reference Vulnerability
- CVE-2019-7192: QNAP Photo Station Improper Access Control Vulnerability
- CVE-2019-7193: QNAP QTS Improper Input Validation Vulnerability
- CVE-2019-7194: QNAP Photo Station Path Traversal Vulnerability
- CVE-2019-7195: QNAP Photo Station Path Traversal Vulnerability
- CVE-2018-19943: QNAP NAS File Station Cross-Site Scripting Vulnerability