CVE-2021-1636
Estado: ModificadaAlta (8.8)—💥 PoC
Microsoft SQL Elevation of Privilege Vulnerability
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 6.15%
- Percentil entre todas las CVEs puntuadas: 93
- Fecha de la puntuación: 6/10/2026
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).
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub
⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.
Tecnologías afectadas (1)
CWE
- CWE-89
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-1636",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
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"baseScore": 6.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
"authentication": "SINGLE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
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"cvssData": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
},
{
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"cvssData": {
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"integrityImpact": "HIGH",
"userInteraction": "NONE",
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},
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}
]
},
"affected": [
{
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"affectedData": [
{
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],
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{
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{
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"versions": [
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"platforms": [
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},
{
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"vendor": "Microsoft",
"product": "Microsoft SQL Server 2014 Service Pack 3 (CU 4)",
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{
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{
"cpes": [
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"vendor": "Microsoft",
"product": "Microsoft SQL Server 2016 Service Pack 2 (CU 15)",
"versions": [
{
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"platforms": [
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{
"cpes": [
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],
"vendor": "Microsoft",
"product": "Microsoft SQL Server 2019 (CU 8)",
"versions": [
{
"status": "affected",
"version": "16.0.0",
"lessThan": "publication",
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],
"platforms": [
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},
{
"cpes": [
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],
"vendor": "Microsoft",
"product": "Microsoft SQL Server 2019 (GDR)",
"versions": [
{
"status": "affected",
"version": "15.0.0",
"lessThan": "publication",
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}
],
"platforms": [
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}
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}
],
"published": "2021-01-12T20:15:30.167",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1636",
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1636",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-89"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Microsoft SQL Elevation of Privilege Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Elevación de Privilegios de Microsoft SQL"
}
],
"lastModified": "2026-06-17T03:32:12.540",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:sql_server:2012:sp4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D7BD8F6C-FD88-483F-95E8-16F7A6BCFCC5"
},
{
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{
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{
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"matchCriteriaId": "9144F644-A3D4-440C-8978-257E71204617"
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],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secure@microsoft.com"
}