CVE-2023-47565 (GCVE-0-2023-47565)
Vulnerability from cvelistv5 – Published: 2023-12-08 16:06 – Updated: 2025-10-21 23:05Title
Legacy VioStor NVR
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
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-12-20 05:00 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.qnap.com/en/security-advisory/qsa-23-48 | |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | VioStor NVR |
Affected:
4.x , < 5.0.0
(custom)
|
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: b118c930-4193-4a0c-8d13-32a0c3237363
Exploited: Yes
Timestamps
First Seen: 2023-12-21
Asserted: 2023-12-21
Scope
Notes: QNAP VioStor NVR OS Command Injection Vulnerability | Affected: QNAP / VioStor NVR | Description: QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-01-11 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.qnap.com/en/security-advisory/qsa-23-48 ; https://nvd.nist.gov/vuln/detail/CVE-2023-47565
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-78 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | VioStor NVR |
| Due Date | 2024-01-11 |
| Date Added | 2023-12-21 |
| Vendorproject | QNAP |
| Vulnerabilityname | QNAP VioStor NVR OS Command Injection Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: aa4213fc-d78f-4412-9ac0-29b7c21e81f7
Exploited: Yes
Timestamps
First Seen: 2023-12-21
Asserted: 2023-12-21
Scope
Notes: Legacy VioStor NVR | Affected: QNAP / VioStor NVR | CVSS: 8.0 (HIGH) | EPSS: 0.73277 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | Legacy VioStor NVR |
| Cve Id | CVE-2023-47565 |
| Vendor | QNAP |
| Ghsa Id | None |
| Product | VioStor NVR |
| Added Date | 2023-12-21T00:00:00.000Z |
| Cvss Score | 8.0 |
| Epss Score | 0.73277 |
| Previous Ids | |
| Cvss Severity | HIGH |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.99447 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2023-47565 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T21:09:37.379Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-47565",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2023-12-20T05:00:54.187898Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2023-12-21",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:05:29.811Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-12-21T00:00:00.000Z",
"value": "CVE-2023-47565 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"QVR Firmware"
],
"product": "VioStor NVR",
"vendor": "QNAP Systems Inc.",
"versions": [
{
"lessThan": "5.0.0",
"status": "affected",
"version": "4.x",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Chad Seaman and Larry Cashdollar of Akamai Technologies reported this vulnerability to CISA"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn 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.\u003c/p\u003e\u003cp\u003eWe have already fixed the vulnerability in the following versions:\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: var(--wht);\"\u003eQVR Firmware 5.0.0\u003c/span\u003e\u003cspan style=\"background-color: var(--wht);\"\u003e\u0026nbsp;and later\u003c/span\u003e\u003c/p\u003e"
}
],
"value": "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.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0\u00a0and later"
}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-12-08T16:06:29.861Z",
"orgId": "2fd009eb-170a-4625-932b-17a53af1051f",
"shortName": "qnap"
},
"references": [
{
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eWe have already fixed the vulnerability in the following versions:\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: var(--wht);\"\u003eQVR Firmware 5.0.0\u003c/span\u003e\u003cspan style=\"background-color: var(--wht);\"\u003e\u0026nbsp;and later\u003c/span\u003e\u003c/p\u003e"
}
],
"value": "We have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0\u00a0and later"
}
],
"source": {
"advisory": "QSA-23-48",
"discovery": "EXTERNAL"
},
"title": "Legacy VioStor NVR",
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f",
"assignerShortName": "qnap",
"cveId": "CVE-2023-47565",
"datePublished": "2023-12-08T16:06:29.861Z",
"dateReserved": "2023-11-06T14:11:12.322Z",
"dateUpdated": "2025-10-21T23:05:29.811Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-47565",
"date": "2026-10-02",
"epss": "0.73277",
"percentile": "0.99448"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"QVR Firmware"
],
"product": "VioStor NVR",
"vendor": "QNAP Systems Inc.",
"versions": [
{
"lessThan": "5.0.0",
"status": "affected",
"version": "4.x",
"versionType": "custom"
}
]
}
],
"source": "security@qnapsecurity.com.tw"
}
],
"cisaActionDue": "2024-01-11",
"cisaExploitAdd": "2023-12-21",
"cisaRequiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "QNAP VioStor NVR OS Command Injection Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:qnap:qvr_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4FCA8C58-1B8E-4340-9EFB-26751B112629",
"versionEndExcluding": "5.0.0",
"versionStartIncluding": "4.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0\u00a0and later"
},
{
"lang": "es",
"value": "Se ha descubierto que una vulnerabilidad de inyecci\u00f3n de comandos del sistema operativo afecta a los modelos QNAP VioStor NVR heredados que ejecutan el firmware QVR 4.x. Si se explota, la vulnerabilidad podr\u00eda permitir a los usuarios autenticados ejecutar comandos a trav\u00e9s de una red. Ya hemos solucionado la vulnerabilidad en las siguientes versiones: QVR Firmware 5.0.0 y posteriores"
}
],
"id": "CVE-2023-47565",
"lastModified": "2026-06-17T06:32:55.230",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.1,
"impactScore": 5.9,
"source": "security@qnapsecurity.com.tw",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-47565",
"options": [
{
"exploitation": "active"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2023-12-20T05:00:54.187898Z",
"version": "2.0.3"
}
}
]
},
"published": "2023-12-08T16:15:16.367",
"references": [
{
"source": "security@qnapsecurity.com.tw",
"tags": [
"Vendor Advisory"
],
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565"
}
],
"sourceIdentifier": "security@qnapsecurity.com.tw",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-78"
}
],
"source": "security@qnapsecurity.com.tw",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-78"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T21:09:37.379Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-47565",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2023-12-20T05:00:54.187898Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2023-12-21",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-02-03T16:28:56.926Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-12-21T00:00:00+00:00",
"value": "CVE-2023-47565 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"QVR Firmware"
],
"product": "VioStor NVR",
"vendor": "QNAP Systems Inc.",
"versions": [
{
"lessThan": "5.0.0 ",
"status": "affected",
"version": "4.x",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Chad Seaman and Larry Cashdollar of Akamai Technologies reported this vulnerability to CISA"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn 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.\u003c/p\u003e\u003cp\u003eWe have already fixed the vulnerability in the following versions:\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: var(--wht);\"\u003eQVR Firmware 5.0.0\u003c/span\u003e\u003cspan style=\"background-color: var(--wht);\"\u003e\u0026nbsp;and later\u003c/span\u003e\u003c/p\u003e"
}
],
"value": "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.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0\u00a0and later\n\n"
}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-12-08T16:06:29.861Z",
"orgId": "2fd009eb-170a-4625-932b-17a53af1051f",
"shortName": "qnap"
},
"references": [
{
"url": "https://www.qnap.com/en/security-advisory/qsa-23-48"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eWe have already fixed the vulnerability in the following versions:\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: var(--wht);\"\u003eQVR Firmware 5.0.0\u003c/span\u003e\u003cspan style=\"background-color: var(--wht);\"\u003e\u0026nbsp;and later\u003c/span\u003e\u003c/p\u003e"
}
],
"value": "We have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0\u00a0and later\n\n"
}
],
"source": {
"advisory": "QSA-23-48",
"discovery": "EXTERNAL"
},
"title": "Legacy VioStor NVR",
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f",
"assignerShortName": "qnap",
"cveId": "CVE-2023-47565",
"datePublished": "2023-12-08T16:06:29.861Z",
"dateReserved": "2023-11-06T14:11:12.322Z",
"dateUpdated": "2025-10-21T23:05:29.811Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…