{"id":"CVE-2026-69391","aliases":["EUVD-2026-73237","GHSA-mgx7-j8rm-p2mw"],"status":"published","title":"Windows Broker Infrastructure Service Elevation of Privilege Vulnerability","description":"Stack-based buffer overflow in Windows Broker Infrastructure Service 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":"2026-11-11","score":0.00333,"percentile":0.2699,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-09-08T17:11:11Z","modified":"2026-11-10T21:29:51Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"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 11 version 26h1"},{"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_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_11_26h1"},{"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-2026-69391","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69391"},{"url":"https://github.com/advisories/GHSA-mgx7-j8rm-p2mw"}],"sources":{"cve":[{"id":"CVE-2026-69391","title":"Windows Broker Infrastructure Service Elevation of Privilege Vulnerability","description":"Stack-based buffer overflow in Windows Broker Infrastructure Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:11:11.304Z","modified":"2026-11-10T21:29:51.482Z","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-121"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-73237","description":"Stack-based buffer overflow in Windows Broker Infrastructure Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:11:11Z","modified":"2026-11-10T21:29:51Z","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":"2026-11-10T22:23:53.990018Z"}],"ghsa":[{"id":"GHSA-mgx7-j8rm-p2mw","title":"Stack-based buffer overflow in Windows Broker Infrastructure Service allows an authorized...","description":"Stack-based buffer overflow in Windows Broker Infrastructure Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:32:29Z","modified":"2026-09-08T18:32:34Z","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-121"],"updated_at":"2026-11-02T15:11:30.562219Z"}],"nvd":[{"id":"CVE-2026-69391","description":"Stack-based buffer overflow in Windows Broker Infrastructure Service allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:19:01.047Z","modified":"2026-09-25T15:56:52.423Z","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-121"],"updated_at":"2026-11-02T14:12:44.840742Z"}]}}