{"id":"CVE-2026-20817","aliases":["EUVD-2026-2188","GHSA-p4qh-cj7j-r785"],"status":"published","title":"Windows Error Reporting Service Elevation of Privilege Vulnerability","description":"Improper handling of insufficient permissions or privileges in Windows Error Reporting 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":0.05422,"percentile":0.92768,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-280"],"published":"2026-01-13T17:56:14Z","modified":"2026-07-30T21:16:58Z","exploits":[{"source":"pocgithub","id":"oxfemale/CVE-2026-20817","title":"oxfemale/CVE-2026-20817","date":"2026-02-18","url":"https://github.com/oxfemale/CVE-2026-20817"},{"source":"pocgithub","id":"dwgth4i/CVE-2026-20817","title":"dwgth4i/CVE-2026-20817","date":"2026-05-28","url":"https://github.com/dwgth4i/CVE-2026-20817"}],"products":[{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20817","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-20817-detection-script-eop-vulnerabilit-in-windows-error-reporting"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-20817-mitigation-script-eop-vulnerability-in-windows-error-reporting"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20817"},{"url":"https://github.com/advisories/GHSA-p4qh-cj7j-r785"}],"sources":{"cve":[{"id":"CVE-2026-20817","title":"Windows Error Reporting Service Elevation of Privilege Vulnerability","description":"Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-01-13T17:56:14.091Z","modified":"2026-07-30T20:46:31.875Z","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-280"],"updated_at":"2026-11-02T13:35:44.571002Z"}],"euvd":[{"id":"EUVD-2026-2188","description":"Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-01-13T17:56:14Z","modified":"2026-07-30T20:46:31Z","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":"2026-11-02T18:02:27.233735Z"}],"ghsa":[{"id":"GHSA-p4qh-cj7j-r785","title":"Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an...","description":"Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-01-13T18:31:08Z","modified":"2026-05-26T21:31:36Z","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-280"],"updated_at":"2026-11-02T15:08:18.762226Z"}],"nvd":[{"id":"CVE-2026-20817","description":"Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-01-13T18:16:08.647Z","modified":"2026-07-30T21:16:58.193Z","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-280"],"updated_at":"2026-11-02T14:12:03.683495Z"}]}}