{"id":"CVE-2020-0839","aliases":["EUVD-2020-2311","GHSA-p938-6r45-wv6w"],"status":"published","title":"Windows dnsrslvr.dll Elevation of Privilege Vulnerability","description":"\u003cp\u003eAn elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.\u003c/p\u003e\n\u003cp\u003eTo exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by ensuring the dnsrslvr.dll properly handles objects in memory.\u003c/p\u003e","severity":{"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/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00931,"percentile":0.60901,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2020-09-11T17:08:24Z","modified":"2026-06-17T02:46:44Z","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 10 version 2004"},{"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 2004"},{"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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0839","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-0839"},{"url":"https://github.com/advisories/GHSA-p938-6r45-wv6w"}],"sources":{"cve":[{"id":"CVE-2020-0839","title":"Windows dnsrslvr.dll Elevation of Privilege Vulnerability","description":"\u003cp\u003eAn elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.\u003c/p\u003e\n\u003cp\u003eTo exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by ensuring the dnsrslvr.dll properly handles objects in memory.\u003c/p\u003e","status":"published","published":"2020-09-11T17:08:24Z","modified":"2024-08-04T06:18:03.449Z","cvss":[{"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/E:P/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:35:59.434367Z"}],"euvd":[{"id":"EUVD-2020-2311","description":"\u003cp\u003eAn elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.\u003c/p\u003e\n\u003cp\u003eTo exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by ensuring the dnsrslvr.dll properly handles objects in memory.\u003c/p\u003e","status":"published","published":"2020-09-11T17:08:24Z","modified":"2024-08-04T06:18:03Z","cvss":[{"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/E:P/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T03:08:17.347367Z"}],"ghsa":[{"id":"GHSA-p938-6r45-wv6w","title":"An elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects...","description":"An elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory, aka 'Windows dnsrslvr.dll Elevation of Privilege Vulnerability'.","status":"published","published":"2022-05-24T17:27:54Z","modified":"2024-01-01T00:30:38Z","cvss":[{"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"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:55:19.223338Z"}],"nvd":[{"id":"CVE-2020-0839","description":"\u003cp\u003eAn elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.\u003c/p\u003e\n\u003cp\u003eTo exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by ensuring the dnsrslvr.dll properly handles objects in memory.\u003c/p\u003e","status":"published","published":"2020-09-11T17:15:14.137Z","modified":"2026-06-17T02:46:44.223Z","cvss":[{"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":"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":"2026-11-02T14:06:14.981587Z"}]}}