FKIE_CVE-2020-16891
Vulnerability from fkie_nvd - Published: 2020-10-16 23:15 - Updated: 2026-06-17 02:58
Severity
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/
Summary
<p>A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.</p>
<p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p>
<p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| microsoft | windows_10 | - | |
| microsoft | windows_10 | 1607 | |
| microsoft | windows_10 | 1709 | |
| microsoft | windows_10 | 1803 | |
| microsoft | windows_10 | 1809 | |
| microsoft | windows_10 | 1903 | |
| microsoft | windows_10 | 1909 | |
| microsoft | windows_10 | 2004 | |
| microsoft | windows_7 | - | |
| microsoft | windows_8.1 | - | |
| microsoft | windows_server_2008 | - | |
| microsoft | windows_server_2008 | r2 | |
| microsoft | windows_server_2012 | - | |
| microsoft | windows_server_2012 | r2 | |
| microsoft | windows_server_2016 | - | |
| microsoft | windows_server_2016 | 1903 | |
| microsoft | windows_server_2016 | 1909 | |
| microsoft | windows_server_2016 | 2004 | |
| microsoft | windows_server_2019 | - |
{
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],
"source": "secure@microsoft.com"
}
],
"configurations": [
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "\u003cp\u003eA remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.\u003c/p\u003e\n\u003cp\u003eAn attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.\u003c/p\u003e"
},
{
"lang": "es",
"value": "Se presenta una vulnerabilidad de ejecuci\u00f3n de c\u00f3digo remota cuando Windows Hyper-V en un servidor host presenta un fallo al comprobar apropiadamente la entrada de un usuario autenticado en un sistema operativo invitado, tambi\u00e9n se conoce como \"Windows Hyper-V Remote Code Execution Vulnerability\""
}
],
"id": "CVE-2020-16891",
"lastModified": "2026-06-17T02:58:12.393",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
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"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.2,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 10.0,
"obtainAllPrivilege": false,
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
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{
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"baseScore": 8.8,
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"privilegesRequired": "LOW",
"scope": "CHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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"source": "nvd@nist.gov",
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},
"published": "2020-10-16T23:15:13.040",
"references": [
{
"source": "secure@microsoft.com",
"tags": [
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"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16891"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
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"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16891"
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"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Modified",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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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
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They have not been verified by an analyst and are provided for guidance only.
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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.
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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.