{"id":"CVE-2026-66816","aliases":[],"cve":{"records":[{"id":"CVE-2026-66816","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-07-27T19:02:26.601Z","published":"2026-09-08T17:14:27.698Z","modified":"2026-10-31T16:13:09.174Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-31T16:13:09.174Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-09-08T18:35:17.186Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-778","description":"CWE-778: Insufficient Logging","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.1200.5"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:*","versionStartIncluding":"17.0.1050.2","versionEndExcluding":"17.0.1135.8"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:*","versionStartIncluding":"17.0.0.0","versionEndExcluding":"17.0.4085.5"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*","versionStartIncluding":"16.0.0.0","versionEndExcluding":"16.0.4275.2"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-09-08T18:24:17.455538Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Microsoft SQL Server Security Feature Bypass Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.","score":6.5,"severity":"medium","published":"2026-09-08T17:14:27.698Z","modified":"2026-10-31T16:13:09.174Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":"Microsoft SQL Server 2022 (CU 26)","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0.0","status":"affected","lessThan":"16.0.4275.2","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"},{"vendor":"Microsoft","name":"Microsoft SQL Server 2022 (GDR)","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.1200.5","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"},{"vendor":"Microsoft","name":"Microsoft SQL Server 2025 (CU8)","platforms":["x64-based Systems"],"versions":[{"version":"17.0.0.0","status":"affected","lessThan":"17.0.4085.5","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"},{"vendor":"Microsoft","name":"Microsoft SQL Server 2025 for x64-based Systems (GDR)","platforms":["x64-based Systems"],"versions":[{"version":"17.0.1050.2","status":"affected","lessThan":"17.0.1135.8","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816"],"sources":[{"name":"CVE","id":"CVE-2026-66816","modified":"2026-10-31T16:13:09.174Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"}],"assessments":[{"source":"microsoft","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","score":6.5}],"sourceAffected":[],"observedAt":"2026-10-31T16:21:29.510Z","kev":{"status":"not-listed","checkedAt":"2026-11-05T09:05:32.829Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-31T14:40:36.502Z","attemptedAt":"2026-10-31T14:40:36.502Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-31T14:40:36.855Z","attemptedAt":"2026-10-31T14:40:36.855Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-31T14:40:38.006Z","attemptedAt":"2026-10-31T14:40:38.006Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-31T14:40:36.588Z","attemptedAt":"2026-10-31T14:40:36.588Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-66816","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66816","modified":"2026-09-16T11:57:48.333","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-31T14:40:36.502Z"},{"source":"FIRST EPSS","id":"CVE-2026-66816","url":"https://www.first.org/epss/","probability":0.00995,"percentile":0.62671,"date":"2026-10-31","checkedAt":"2026-10-31T14:40:36.588Z"},{"source":"GitHub Advisory Database","id":"GHSA-c9p4-3ww6-v9gp","url":"https://github.com/advisories/GHSA-c9p4-3ww6-v9gp","modified":"2026-09-08T18:32:14Z","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-31T14:40:36.855Z"},{"source":"ENISA EUVD","id":"EUVD-2026-73376","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-73376","modified":"Oct 30, 2026, 9:52:55 PM","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","checkedAt":"2026-10-31T14:40:38.006Z"}],"aiSummary":{"text":"Microsoft SQL Server has a security feature bypass vulnerability due to insufficient logging, allowing an authorized attacker to bypass a security feature over a network, affecting versions 16.0.0.0 to 16.0.4275.2 and 17.0.0.0 to 17.0.4085.5. The vulnerability is identified as CWE-778.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T03:01:07.647Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-66816"}]}}