{"id":"CVE-2026-62803","aliases":["EUVD-2026-56671","GHSA-6jpx-3jw7-m427"],"status":"published","title":"Windows DHCP Server Elevation of Privilege Vulnerability","description":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.","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:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0037,"percentile":0.31244,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-59"],"published":"2026-08-11T17:06:18Z","modified":"2026-10-30T17:22:05Z","products":[{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"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 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62803","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62803"},{"url":"https://github.com/advisories/GHSA-6jpx-3jw7-m427"}],"sources":{"cve":[{"id":"CVE-2026-62803","title":"Windows DHCP Server Elevation of Privilege Vulnerability","description":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-08-11T17:06:18.017Z","modified":"2026-10-30T17:22:05.443Z","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:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:20:14.999906Z"}],"euvd":[{"id":"EUVD-2026-56671","description":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-08-11T17:06:18Z","modified":"2026-10-30T17:22:05Z","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:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T16:59:03.905686Z"}],"ghsa":[{"id":"GHSA-6jpx-3jw7-m427","title":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an...","description":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-08-11T18:31:24Z","modified":"2026-08-11T18:31:29Z","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-59"],"updated_at":"2026-11-02T15:10:19.387522Z"}],"nvd":[{"id":"CVE-2026-62803","description":"Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-08-11T17:18:34.567Z","modified":"2026-09-02T18:20:52.913Z","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"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:12:36.499002Z"}]}}