{"id":"CVE-2021-26701","state":"PUBLISHED","title":".NET Core Remote Code Execution Vulnerability","description":".NET Core Remote Code Execution Vulnerability","publishedAt":"2021-02-25T23:02:00.000Z","updatedAt":"2026-05-28T19:31:26.157Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"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","source":"microsoft"},"assigner":"microsoft","products":["Microsoft .NET Core 2.1","Microsoft .NET Core 3.1","Microsoft .NET 5.0","Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)","Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)","Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)","Microsoft Visual Studio 2019 for Mac","Microsoft Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)","Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)","Microsoft PowerShell Core 7.1","Microsoft PowerShell Core 7.0"],"affected":[{"vendor":"Microsoft","product":".NET Core 2.1","versions":[{"version":"2.1","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":".NET Core 3.1","versions":[{"version":"3.1","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":".NET 5.0","versions":[{"version":"5.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)","versions":[{"version":"16.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)","versions":[{"version":"15.9.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)","versions":[{"version":"16.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Visual Studio 2019 for Mac","versions":[{"version":"8.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)","versions":[{"version":"16.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)","versions":[{"version":"15.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"PowerShell Core 7.1","versions":[{"version":"7.1.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"PowerShell Core 7.0","versions":[{"version":"7.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]}],"references":["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/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/","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/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/","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/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/"],"weaknesses":[],"ingestedAt":"2026-10-29T19:48:13.210Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/26xxx/CVE-2021-26701.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-26701","state":"PUBLISHED","datePublished":"2021-02-25T23:02:00.000Z","dateUpdated":"2026-05-28T19:31:26.157Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2021-02-05T00:00:00.000Z"},"containers":{"cna":{"title":".NET Core Remote Code Execution Vulnerability","descriptions":[{"lang":"en-US","value":".NET Core Remote Code Execution Vulnerability"}],"affected":[{"vendor":"Microsoft","product":".NET Core 2.1","versions":[{"version":"2.1","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":".NET Core 3.1","versions":[{"version":"3.1","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":".NET 5.0","versions":[{"version":"5.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)","versions":[{"version":"16.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)","versions":[{"version":"15.9.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)","versions":[{"version":"16.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Visual Studio 2019 for Mac","versions":[{"version":"8.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:-:*:*:*:*:macos:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.8 (includes 16.0 - 16.7)","versions":[{"version":"16.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)","versions":[{"version":"15.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"PowerShell Core 7.1","versions":[{"version":"7.1.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]},{"vendor":"Microsoft","product":"PowerShell Core 7.0","versions":[{"version":"7.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"],"platforms":["Unknown"]}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701","tags":["x_refsource_MISC"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/","name":"FEDORA-2021-e2d218afe6","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/","name":"FEDORA-2021-904d0bd496","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/","name":"FEDORA-2021-1b22f31541","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/","name":"FEDORA-2021-138728e59b","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/","name":"FEDORA-2021-3da33cdc80","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/","name":"FEDORA-2021-265a3c7cb9","tags":["vendor-advisory","x_refsource_FEDORA"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":8.1,"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"}}],"problemTypes":[{"descriptions":[{"description":"Remote Code Execution","lang":"en-US","type":"Impact"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2023-12-29T22:33:26.742Z"},"datePublic":"2021-02-09T08:00:00.000Z"},"adp":[{"title":"CVE Program Container","references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK/","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/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ/","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/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4/","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/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP/","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/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5/","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/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5/","name":"FEDORA-2021-265a3c7cb9","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T20:33:40.798Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-01-03T18:45:55.001089Z","id":"CVE-2021-26701","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-28T19:31:26.157Z"}}]}}}