CVE-2021-26701
Estado: ModificadaCrítica (9.8)—
.NET Core Remote Code Execution Vulnerability
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 30%
- Percentil entre todas las CVEs puntuadas: 98
- 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
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-26701",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-26701",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2024-01-03T18:45:55.001089Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 7.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/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": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.1,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.2
},
{
"type": "Secondary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": ".NET Core 2.1",
"versions": [
{
"status": "affected",
"version": "2.1",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": ".NET Core 3.1",
"versions": [
{
"status": "affected",
"version": "3.1",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": ".NET 5.0",
"versions": [
{
"status": "affected",
"version": "5.0.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
"versions": [
{
"status": "affected",
"version": "16.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
"versions": [
{
"status": "affected",
"version": "15.9.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)",
"versions": [
{
"status": "affected",
"version": "16.0.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*"
],
"vendor": "Microsoft",
"product": "Visual Studio 2019 for Mac",
"versions": [
{
"status": "affected",
"version": "8.0.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)",
"versions": [
{
"status": "affected",
"version": "16.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
"versions": [
{
"status": "affected",
"version": "15.0.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "PowerShell Core 7.1",
"versions": [
{
"status": "affected",
"version": "7.1.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"vendor": "Microsoft",
"product": "PowerShell Core 7.0",
"versions": [
{
"status": "affected",
"version": "7.0.0",
"lessThan": "publication",
"versionType": "custom"
}
],
"platforms": [
"Unknown"
]
}
]
}
],
"published": "2021-02-25T23:15:16.913",
"references": [
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/",
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/",
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/",
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/",
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/",
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/",
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "secure@microsoft.com"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701",
"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 Remote Code Execution Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Ejecución de Código Remota de .NET Core. Este ID de CVE es diferente de CVE-2021-24112"
}
],
"lastModified": "2026-06-17T03:43:40.920",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "74874B42-850B-437F-92C8-7FED4FF5FC79",
"versionEndExcluding": "5.0.4",
"versionStartIncluding": "5.0"
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E640EFC6-AC25-4F4E-9E8D-B46DEE56CC51",
"versionEndExcluding": "2.1.28",
"versionStartIncluding": "2.1"
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7A13EB41-E11C-473B-82C7-D693121F8AA2",
"versionEndExcluding": "3.1.15",
"versionStartIncluding": "3.1"
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6A812D8D-C6DA-473E-A604-988BCDA26CDD"
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AAFBD34E-F04C-4B1B-AFD4-0D926BC30609"
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9E7A027C-A6FD-4330-B5DA-338B96E8C60F",
"versionEndIncluding": "16.9",
"versionStartIncluding": "16.0"
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*",
"vulnerable": true,
"matchCriteriaId": "21FE380F-7A47-4C72-8F07-526226531175"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956"
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secure@microsoft.com"
}