CVE-2021-34485
Estado: ModificadaMedia (5.5)—
.NET Core and Visual Studio Information Disclosure Vulnerability
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.47%
- Percentil entre todas las CVEs puntuadas: 73
- 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).
Tecnologías afectadas (5)
CWE
- NVD-CWE-noinfo
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-34485",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 2.1,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 3.6,
"exploitabilityScore": 1.3
},
{
"type": "Secondary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
"product": ".NET 5.0",
"versions": [
{
"status": "affected",
"version": "5.0.0",
"lessThan": "5.0.9",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET Core 2.1",
"versions": [
{
"status": "affected",
"version": "2.1",
"lessThan": "2.1.30",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET Core 3.1",
"versions": [
{
"status": "affected",
"version": "3.1",
"lessThan": "3.1.18",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
"versions": [
{
"status": "affected",
"version": "15.9.0",
"lessThan": "15.9.38",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)",
"versions": [
{
"status": "affected",
"version": "16.10.0",
"lessThan": "16.10.5",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
"versions": [
{
"status": "affected",
"version": "16.0",
"lessThan": "16.4.25",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)",
"versions": [
{
"status": "affected",
"version": "16.0.0",
"lessThan": "16.7.18",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
"versions": [
{
"status": "affected",
"version": "15.0.0",
"lessThan": "16.9.10",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "PowerShell 7.0",
"versions": [
{
"status": "affected",
"version": "7.0.0",
"lessThan": "7.0.7",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "PowerShell 7.1",
"versions": [
{
"status": "affected",
"version": "7.1.0",
"lessThan": "7.1.4",
"versionType": "custom"
}
]
}
]
}
],
"published": "2021-08-12T18:15:09.157",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34485",
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": ".NET Core and Visual Studio Information Disclosure Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Divulgación de Información en .NET Core y Visual Studio"
}
],
"lastModified": "2026-08-10T16:17:50.723",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B85CD4C7-D84B-4C54-A604-FC852038A565",
"versionEndIncluding": "5.0.8",
"versionStartIncluding": "5.0"
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FB624437-CB1B-46A2-BF75-30035D99D2EF",
"versionEndIncluding": "2.1.28",
"versionStartIncluding": "2.1"
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6F344BDC-2929-4CEA-8414-E4D07C1F76F0",
"versionEndIncluding": "3.1.17",
"versionStartIncluding": "3.1"
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BE4005F4-89BB-4597-9070-1137B4CEFC9B",
"versionEndExcluding": "7.0.7",
"versionStartIncluding": "7.0"
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "40F33C0C-7AF0-4B48-828C-00534012D728",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "7.1"
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CE03B37D-72FE-4C25-BE62-9C422AEFC80E",
"versionEndIncluding": "15.9",
"versionStartIncluding": "15.0"
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "26472C42-CDB4-4176-B10B-3BF26F5030E3",
"versionEndIncluding": "16.10",
"versionStartIncluding": "16.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secure@microsoft.com"
}