{"id":"CVE-2026-66818","aliases":["EUVD-2026-73377","GHSA-hx68-h5c3-vvjp"],"status":"published","title":"Microsoft SQL Server Elevation of Privilege Vulnerability","description":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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":0.00778,"percentile":0.56184,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2026-09-08T17:14:28Z","modified":"2026-11-10T21:33:18Z","products":[{"vendor":"microsoft","product":"microsoft sql server 2017 (cu 31)"},{"vendor":"microsoft","product":"microsoft sql server 2017 (gdr)"},{"vendor":"microsoft","product":"microsoft sql server 2019 (cu 32)"},{"vendor":"microsoft","product":"microsoft sql server 2019 (gdr)"},{"vendor":"microsoft","product":"microsoft sql server 2022 (cu 26)"},{"vendor":"microsoft","product":"microsoft sql server 2022 (gdr)"},{"vendor":"microsoft","product":"microsoft sql server 2025 (cu8)"},{"vendor":"microsoft","product":"microsoft sql server 2025 for x64-based systems (gdr)"},{"vendor":"microsoft","product":"sql_server_2017"},{"vendor":"microsoft","product":"sql_server_2019"},{"vendor":"microsoft","product":"sql_server_2022"},{"vendor":"microsoft","product":"sql_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66818","tags":["vendor-advisory","patch","Vendor Advisory","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66818"},{"url":"https://github.com/advisories/GHSA-hx68-h5c3-vvjp"}],"sources":{"cve":[{"id":"CVE-2026-66818","title":"Microsoft SQL Server Elevation of Privilege Vulnerability","description":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-08T17:14:28.23Z","modified":"2026-11-10T21:33:18.502Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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-269"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-73377","description":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-08T17:14:28Z","modified":"2026-11-10T21:33:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:49.679186Z"}],"ghsa":[{"id":"GHSA-hx68-h5c3-vvjp","title":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges...","description":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-08T18:32:08Z","modified":"2026-09-08T18:32:14Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:11:29.303164Z"}],"nvd":[{"id":"CVE-2026-66818","description":"Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-08T18:18:20.143Z","modified":"2026-09-16T11:58:41.03Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:12:44.436435Z"}]}}