{"id":"CVE-2021-43877","aliases":["BIT-aspnet-core-2021-43877","EUVD-2021-30739"],"status":"published","title":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00733,"percentile":0.54657,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2021-12-15T14:15:31Z","modified":"2026-11-04T02:30:58Z","fixes":[{"ecosystem":"Bitnami","package":"aspnet-core","fixed_in":["3.1.1","5.0.1","6.0.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"aspnet-core","ranges":[{"type":"SEMVER","events":[{"introduced":"3.1.0"},{"fixed":"3.1.1"},{"introduced":"5.0.0"},{"fixed":"5.0.1"},{"introduced":"6.0.0"},{"fixed":"6.0.1"}]}]}],"products":[{"vendor":"microsoft","product":"asp.net core 3.1"},{"vendor":"microsoft","product":"asp.net core 5.0"},{"vendor":"microsoft","product":"asp.net core 6.0"},{"vendor":"microsoft","product":"asp.net_core"},{"vendor":"microsoft","product":"microsoft visual studio 2019 version 16.11 (includes 16.0 - 16.10)"},{"vendor":"microsoft","product":"microsoft visual studio 2019 version 16.7 (includes 16.0 – 16.6)"},{"vendor":"microsoft","product":"microsoft visual studio 2019 version 16.9 (includes 16.0 - 16.8)"},{"vendor":"microsoft","product":"microsoft visual studio 2022 version 17.0"},{"vendor":"microsoft","product":"microsoft visual studio 2022 version 17.1"},{"vendor":"microsoft","product":"visual_studio_2019"},{"vendor":"microsoft","product":"visual_studio_2022"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43877","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43877","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-43877","title":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T14:15:31Z","modified":"2026-11-02T18:14:55.026Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T19:47:06.831391Z"}],"euvd":[{"id":"EUVD-2021-30739","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T14:15:31Z","modified":"2026-11-02T18:14:55Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T05:08:38.713005Z"}],"nvd":[{"id":"CVE-2021-43877","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T15:15:10.95Z","modified":"2026-11-02T19:17:45.86Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-03T00:01:40.46005Z"}],"osv":[{"id":"CVE-2021-43877","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T15:15:10.95Z","modified":"2026-11-04T02:30:58.700909753Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T02:54:44.889498Z"},{"id":"BIT-aspnet-core-2021-43877","title":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","description":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","status":"published","published":"2024-03-06T10:53:15.673Z","modified":"2026-09-08T08:45:37.873277904Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}