CVE-2021-26701 (GCVE-0-2021-26701)
Vulnerability from cvelistv5 – Published: 2021-02-25 23:02 – Updated: 2026-05-28 19:31
VLAI
EPSS
VEX
Title
.NET Core Remote Code Execution Vulnerability
Summary
.NET Core Remote Code Execution Vulnerability
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-01-03 18:45 UTC
CWE
- Remote Code Execution
- CWE-noinfo Not enough information
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
11 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Microsoft | .NET Core 2.1 |
Affected:
2.1 , < publication
(custom)
cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:* |
||
| Microsoft | .NET Core 3.1 |
Affected:
3.1 , < publication
(custom)
cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:* |
||
| Microsoft | .NET 5.0 |
Affected:
5.0.0 , < publication
(custom)
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* |
||
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) |
Affected:
16.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:* |
||
| Microsoft | Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) |
Affected:
15.9.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:* |
||
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) |
Affected:
16.0.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:* |
||
| Microsoft | Visual Studio 2019 for Mac |
Affected:
8.0.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:* |
||
| Microsoft | Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7) |
Affected:
16.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:* |
||
| Microsoft | Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) |
Affected:
15.0.0 , < publication
(custom)
cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:* |
||
| Microsoft | PowerShell Core 7.1 |
Affected:
7.1.0 , < publication
(custom)
cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:* |
||
| Microsoft | PowerShell Core 7.0 |
Affected:
7.0.0 , < publication
(custom)
cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:* |
Date Public
2021-02-09 08:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T20:33:40.798Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"name": "FEDORA-2021-e2d218afe6",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/"
},
{
"name": "FEDORA-2021-904d0bd496",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/"
},
{
"name": "FEDORA-2021-1b22f31541",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/"
},
{
"name": "FEDORA-2021-138728e59b",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/"
},
{
"name": "FEDORA-2021-3da33cdc80",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/"
},
{
"name": "FEDORA-2021-265a3c7cb9",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-26701",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-01-03T18:45:55.001089Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-28T19:31:26.157Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET Core 2.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "2.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET Core 3.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "3.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET 5.0",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "5.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.9.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*"
],
"platforms": [
"Unknown"
],
"product": "Visual Studio 2019 for Mac",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "8.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "PowerShell Core 7.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "7.1.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "PowerShell Core 7.0",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "7.0.0",
"versionType": "custom"
}
]
}
],
"datePublic": "2021-02-09T08:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": ".NET Core Remote Code Execution Vulnerability"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Remote Code Execution",
"lang": "en-US",
"type": "Impact"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-12-29T22:33:26.742Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"name": "FEDORA-2021-e2d218afe6",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/"
},
{
"name": "FEDORA-2021-904d0bd496",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/"
},
{
"name": "FEDORA-2021-1b22f31541",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/"
},
{
"name": "FEDORA-2021-138728e59b",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/"
},
{
"name": "FEDORA-2021-3da33cdc80",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/"
},
{
"name": "FEDORA-2021-265a3c7cb9",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/"
}
],
"title": ".NET Core Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2021-26701",
"datePublished": "2021-02-25T23:02:00.000Z",
"dateReserved": "2021-02-05T00:00:00.000Z",
"dateUpdated": "2026-05-28T19:31:26.157Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-26701",
"date": "2026-09-18",
"epss": "0.30096",
"percentile": "0.98131"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"matchCriteriaId": "74874B42-850B-437F-92C8-7FED4FF5FC79",
"versionEndExcluding": "5.0.4",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E640EFC6-AC25-4F4E-9E8D-B46DEE56CC51",
"versionEndExcluding": "2.1.28",
"versionStartIncluding": "2.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7A13EB41-E11C-473B-82C7-D693121F8AA2",
"versionEndExcluding": "3.1.15",
"versionStartIncluding": "3.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.0:*:*:*:*:*:*:*",
"matchCriteriaId": "6A812D8D-C6DA-473E-A604-988BCDA26CDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.1:*:*:*:*:*:*:*",
"matchCriteriaId": "AAFBD34E-F04C-4B1B-AFD4-0D926BC30609",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9E7A027C-A6FD-4330-B5DA-338B96E8C60F",
"versionEndIncluding": "16.9",
"versionStartIncluding": "16.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*",
"matchCriteriaId": "21FE380F-7A47-4C72-8F07-526226531175",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": ".NET Core Remote Code Execution Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de .NET Core. Este ID de CVE es diferente de CVE-2021-24112"
}
],
"id": "CVE-2021-26701",
"lastModified": "2024-11-21T05:56:41.853",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.9,
"source": "secure@microsoft.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Secondary"
}
]
},
"published": "2021-02-25T23:15:16.913",
"references": [
{
"source": "secure@microsoft.com",
"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",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"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",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
}
],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"matchCriteriaId": "74874B42-850B-437F-92C8-7FED4FF5FC79",
"versionEndExcluding": "5.0.4",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E640EFC6-AC25-4F4E-9E8D-B46DEE56CC51",
"versionEndExcluding": "2.1.28",
"versionStartIncluding": "2.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7A13EB41-E11C-473B-82C7-D693121F8AA2",
"versionEndExcluding": "3.1.15",
"versionStartIncluding": "3.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.0:*:*:*:*:*:*:*",
"matchCriteriaId": "6A812D8D-C6DA-473E-A604-988BCDA26CDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:powershell_core:7.1:*:*:*:*:*:*:*",
"matchCriteriaId": "AAFBD34E-F04C-4B1B-AFD4-0D926BC30609",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9E7A027C-A6FD-4330-B5DA-338B96E8C60F",
"versionEndIncluding": "16.9",
"versionStartIncluding": "16.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*",
"matchCriteriaId": "21FE380F-7A47-4C72-8F07-526226531175",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": ".NET Core Remote Code Execution Vulnerability"
},
{
"lang": "es",
"value": "Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de .NET Core. Este ID de CVE es diferente de CVE-2021-24112"
}
],
"id": "CVE-2021-26701",
"lastModified": "2024-11-21T05:56:41.853",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.9,
"source": "secure@microsoft.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Secondary"
}
]
},
"published": "2021-02-25T23:15:16.913",
"references": [
{
"source": "secure@microsoft.com",
"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",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"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",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
}
],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-28T10:58:16+00:00",
"cve": "CVE-2021-26701",
"id": "CVE-2021-26701",
"initial_release_date": "2021-02-25T00:00:00+00:00",
"product_status:fixed": "152",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "dotnet: System.Text.Encodings.Web Remote Code Execution",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-26701.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "critical",
"current_release_date": "2025-07-08T00:15:36Z",
"cve": "CVE-2021-26701",
"id": "CVE-2021-26701",
"initial_release_date": "2023-10-31T02:26:20Z",
"product_status:recommended": "23",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-26701",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-26701.json",
"version": "7"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T20:33:40.798Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"name": "FEDORA-2021-e2d218afe6",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/"
},
{
"name": "FEDORA-2021-904d0bd496",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/"
},
{
"name": "FEDORA-2021-1b22f31541",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/"
},
{
"name": "FEDORA-2021-138728e59b",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/"
},
{
"name": "FEDORA-2021-3da33cdc80",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/"
},
{
"name": "FEDORA-2021-265a3c7cb9",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-26701",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-01-03T18:45:55.001089Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-28T19:30:55.281Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET Core 2.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "2.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET Core 3.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "3.1",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": ".NET 5.0",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "5.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.9.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*"
],
"platforms": [
"Unknown"
],
"product": "Visual Studio 2019 for Mac",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "8.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "16.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "15.0.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "PowerShell Core 7.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "7.1.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"product": "PowerShell Core 7.0",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "7.0.0",
"versionType": "custom"
}
]
}
],
"datePublic": "2021-02-09T08:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": ".NET Core Remote Code Execution Vulnerability"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Remote Code Execution",
"lang": "en-US",
"type": "Impact"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-12-29T22:33:26.742Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701"
},
{
"name": "FEDORA-2021-e2d218afe6",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/"
},
{
"name": "FEDORA-2021-904d0bd496",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/"
},
{
"name": "FEDORA-2021-1b22f31541",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/"
},
{
"name": "FEDORA-2021-138728e59b",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/"
},
{
"name": "FEDORA-2021-3da33cdc80",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/"
},
{
"name": "FEDORA-2021-265a3c7cb9",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/"
}
],
"title": ".NET Core Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2021-26701",
"datePublished": "2021-02-25T23:02:00.000Z",
"dateReserved": "2021-02-05T00:00:00.000Z",
"dateUpdated": "2026-05-28T19:31:26.157Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
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
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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.
Loading…
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.
Loading…