CVE-2021-26431
Estado: ModificadaAlta (7.8)—
Una Vulnerabilidad de Elevación de Privilegios en Windows Recovery Environment Agent
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.18%
- Percentil entre todas las CVEs puntuadas: 67
- Fecha de la puntuación: 15/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)
CWE
- NVD-CWE-Other
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-26431",
"cveTags": [],
"metrics": {
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"source": "nvd@nist.gov",
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"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
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"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
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"confidentialityImpact": "HIGH"
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},
{
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"integrityImpact": "HIGH",
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"confidentialityImpact": "HIGH"
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}
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},
"affected": [
{
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"affectedData": [
{
"vendor": "Microsoft",
"product": "Windows 10 Version 2004",
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{
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{
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"versions": [
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{
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"versions": [
{
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{
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{
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}
],
"platforms": [
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]
}
]
}
],
"published": "2021-08-12T18:15:08.817",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26431",
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26431",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1053/",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Windows Recovery Environment Agent Elevation of Privilege Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Elevación de Privilegios en Windows Recovery Environment Agent"
}
],
"lastModified": "2026-08-10T16:17:33.667",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
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{
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{
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{
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"matchCriteriaId": "0B60D940-80C7-49F0-8F4E-3F99AC15FA82"
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"operator": "OR"
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],
"sourceIdentifier": "secure@microsoft.com"
}