{"containers":{"cna":{"title":"Microsoft Windows Folder Redirection Elevation of Privilege Vulnerability","datePublic":"2021-03-09T08:00:00.000Z","affected":[{"vendor":"Microsoft","product":"Windows 10 Version 2004","cpes":[],"platforms":["32-bit Systems","ARM64-based Systems","x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server version 2004","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 20H2","cpes":[],"platforms":["32-bit Systems","ARM64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server version 20H2","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1803","cpes":[],"platforms":["32-bit Systems","x64-based Systems","ARM64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","cpes":[],"platforms":["32-bit Systems","x64-based Systems","ARM64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2019","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2019 (Server Core installation)","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1909","cpes":[],"platforms":["32-bit Systems","x64-based Systems","ARM64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1909 (Server Core installation)","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1507","cpes":[],"platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1607","cpes":[],"platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2016","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 7","cpes":[],"platforms":["32-bit Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 7 Service Pack 1","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 8.1","cpes":[],"platforms":["32-bit Systems","x64-based Systems","ARM64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2","cpes":[],"platforms":["32-bit Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2 (Server Core installation)","cpes":[],"platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008  Service Pack 2","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1 (Server Core installation)","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012","cpes":["cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*"],"platforms":["x64-based Systems"],"versions":[{"version":"6.2.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 (Server Core installation)","cpes":["cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*"],"platforms":["x64-based Systems"],"versions":[{"version":"6.2.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 R2","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 R2 (Server Core installation)","cpes":[],"platforms":["x64-based Systems"],"versions":[{"version":"N/A","status":"affected"}]}],"descriptions":[{"value":"<p>An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user's personal data to a created folder.</p>\n<p>To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data.</p>\n<p>This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. See the <strong>FAQ</strong> section of this CVE for configuration guidance.</p>","lang":"en-US"}],"problemTypes":[{"descriptions":[{"description":"Elevation of Privilege","lang":"en-US","type":"Impact"}]}],"providerMetadata":{"orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","shortName":"microsoft","dateUpdated":"2023-12-29T20:09:12.476Z"},"references":[{"tags":["x_refsource_MISC"],"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":7.8,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}]},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T20:33:41.285Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887"}]},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-01-09T18:27:46.711163Z","id":"CVE-2021-26887","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-19T16:07:28.981Z"}}]},"cveMetadata":{"assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","assignerShortName":"microsoft","cveId":"CVE-2021-26887","datePublished":"2021-03-11T15:42:16.000Z","dateReserved":"2021-02-08T00:00:00.000Z","dateUpdated":"2024-11-19T16:07:28.981Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}