{"id":"CVE-2020-0993","aliases":["EUVD-2020-2458","GHSA-hccf-j2pf-x736"],"status":"published","title":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries,...","description":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.05241,"percentile":0.92597,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2020-04-15T15:13:17Z","modified":"2026-06-17T02:47:09Z","products":[{"vendor":"microsoft","product":"windows"},{"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 for 32-bit systems"},{"vendor":"microsoft","product":"windows 10 version 1909 for arm64-based systems"},{"vendor":"microsoft","product":"windows 10 version 1909 for x64-based systems"},{"vendor":"microsoft","product":"windows server"},{"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_7"},{"vendor":"microsoft","product":"windows_8.1"},{"vendor":"microsoft","product":"windows_rt_8.1"},{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_server_2012"},{"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-2020-0993","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-0993"},{"url":"https://github.com/advisories/GHSA-hccf-j2pf-x736"}],"sources":{"cve":[{"id":"CVE-2020-0993","description":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.","status":"published","published":"2020-04-15T15:13:17Z","modified":"2024-08-04T06:18:03.618Z","updated_at":"2026-11-02T14:35:59.763887Z"}],"euvd":[{"id":"EUVD-2020-2458","description":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.","status":"published","published":"2020-04-15T15:13:17Z","modified":"2024-08-04T06:18:03Z","updated_at":"2026-11-03T03:08:16.431929Z"}],"ghsa":[{"id":"GHSA-hccf-j2pf-x736","title":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries,...","description":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.","status":"published","published":"2022-05-24T17:14:35Z","modified":"2023-01-29T05:02:16Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:45:02.517815Z"}],"nvd":[{"id":"CVE-2020-0993","description":"A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.","status":"published","published":"2020-04-15T15:15:19.34Z","modified":"2026-06-17T02:47:09.5Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:05:59.125695Z"}]}}