{"id":"CVE-2026-66816","aliases":["EUVD-2026-73376","GHSA-c9p4-3ww6-v9gp"],"status":"published","title":"Microsoft SQL Server Security Feature Bypass Vulnerability","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00995,"percentile":0.62957,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-778"],"published":"2026-09-08T17:14:27Z","modified":"2026-11-10T21:33:15Z","products":[{"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_2022"},{"vendor":"microsoft","product":"sql_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816","tags":["vendor-advisory","patch","Vendor Advisory","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66816"},{"url":"https://github.com/advisories/GHSA-c9p4-3ww6-v9gp"}],"sources":{"cve":[{"id":"CVE-2026-66816","title":"Microsoft SQL Server Security Feature Bypass Vulnerability","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","status":"published","published":"2026-09-08T17:14:27.698Z","modified":"2026-11-10T21:33:15.045Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-778"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-73376","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","status":"published","published":"2026-09-08T17:14:27Z","modified":"2026-11-10T21:33:15Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:49.679186Z"}],"ghsa":[{"id":"GHSA-c9p4-3ww6-v9gp","title":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature...","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","status":"published","published":"2026-09-08T18:32:07Z","modified":"2026-09-08T18:32:14Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-778"],"updated_at":"2026-11-02T15:11:29.303164Z"}],"nvd":[{"id":"CVE-2026-66816","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","status":"published","published":"2026-09-08T18:18:20.01Z","modified":"2026-09-16T11:57:48.333Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-778"],"updated_at":"2026-11-02T14:12:44.436435Z"}]}}