{"id":"CVE-2021-31191","aliases":["EUVD-2021-18104","GHSA-v77w-chqg-hvv8"],"status":"published","title":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","description":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0076,"percentile":0.55603,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2021-05-11T19:11:35Z","modified":"2026-06-17T03:51:25Z","products":[{"vendor":"microsoft","product":"windows 10 version 1803"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 1909"},{"vendor":"microsoft","product":"windows 10 version 2004"},{"vendor":"microsoft","product":"windows 10 version 20h2"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows server, version 1909 (server core installation)"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31191","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31191"},{"url":"https://github.com/advisories/GHSA-v77w-chqg-hvv8"}],"sources":{"cve":[{"id":"CVE-2021-31191","title":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","description":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","status":"published","published":"2021-05-11T19:11:35Z","modified":"2024-08-03T22:55:53.331Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18104","description":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","status":"published","published":"2021-05-11T19:11:35Z","modified":"2024-08-03T22:55:53Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T03:24:39.559154Z"}],"ghsa":[{"id":"GHSA-v77w-chqg-hvv8","title":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","description":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","status":"published","published":"2022-05-24T19:02:00Z","modified":"2023-01-27T05:02:56Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:42:08.04985Z"}],"nvd":[{"id":"CVE-2021-31191","description":"Windows Projected File System FS Filter Driver Information Disclosure Vulnerability","status":"published","published":"2021-05-11T19:15:10.113Z","modified":"2026-06-17T03:51:25.243Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:53.343329Z"}]}}