{"id":"CVE-2020-1123","aliases":["EUVD-2020-12010","GHSA-cwpm-73h2-wvf2"],"status":"published","title":"Connected User Experiences and Telemetry Service Denial of Service Vulnerability","description":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could cause a system to stop responding.\nTo exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability.\nThe security update addresses the vulnerability by  correcting how the Connected User Experiences and Telemetry Service handles file operations.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01095,"percentile":0.65811,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-732"],"published":"2020-05-21T22:53:15Z","modified":"2026-08-19T18:32:27Z","products":[{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1709"},{"vendor":"microsoft","product":"windows 10 version 1709 for 32-bit systems"},{"vendor":"microsoft","product":"windows 10 version 1803"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 1903 for 32-bit systems"},{"vendor":"microsoft","product":"windows 10 version 1903 for arm64-based systems"},{"vendor":"microsoft","product":"windows 10 version 1903 for x64-based systems"},{"vendor":"microsoft","product":"windows 10 version 1909"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server, version 1803  (server core installation)"},{"vendor":"microsoft","product":"windows server, version 1903 (server core installation)"},{"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://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1123","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1123","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1123"},{"url":"https://github.com/advisories/GHSA-cwpm-73h2-wvf2"}],"sources":{"cve":[{"id":"CVE-2020-1123","title":"Connected User Experiences and Telemetry Service Denial of Service Vulnerability","description":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could cause a system to stop responding.\nTo exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability.\nThe security update addresses the vulnerability by  correcting how the Connected User Experiences and Telemetry Service handles file operations.","status":"published","published":"2020-05-21T22:53:15Z","modified":"2026-08-19T16:34:07.852Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:56.213477Z"}],"euvd":[{"id":"EUVD-2020-12010","description":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could cause a system to stop responding.\nTo exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability.\nThe security update addresses the vulnerability by  correcting how the Connected User Experiences and Telemetry Service handles file operations.","status":"published","published":"2020-05-21T22:53:15Z","modified":"2026-08-19T16:34:07Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:01:41.904829Z"}],"ghsa":[{"id":"GHSA-cwpm-73h2-wvf2","title":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service...","description":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations, aka 'Connected User Experiences and Telemetry Service Denial of Service Vulnerability'. This CVE ID is unique from CVE-2020-1084.","status":"published","published":"2022-05-24T17:18:29Z","modified":"2026-08-19T18:32:27Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T15:10:41.712997Z"}],"nvd":[{"id":"CVE-2020-1123","description":"A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could cause a system to stop responding.\nTo exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability.\nThe security update addresses the vulnerability by  correcting how the Connected User Experiences and Telemetry Service handles file operations.","status":"published","published":"2020-05-21T23:15:15.603Z","modified":"2026-08-19T17:17:20.603Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:04.922138Z"}]}}