{"id":"CVE-2026-67643","title":"Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.","summary":"Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"microsoft","product":"sql_server_2022","affected":["sql_server_2022 < 16.0.1200.5","sql_server_2022 >= 16.0.4003.1, < 16.0.4275.2","sql_server_2025 < 17.0.1135.8","sql_server_2025 >= 17.0.4006.2, < 17.0.4085.5"],"patched":["sql_server_2022 16.0.4275.2","sql_server_2025 17.0.4085.5"],"published":"2026-09-08","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:17:00.937","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67643","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67643","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T04:24:47.113385Z"},"epss":0.0089,"epssPercentile":0.57327,"ingestedAt":"2026-09-08T19:08:49.605Z","slug":"CVE-2026-67643","body":"## Overview\n\nHeap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `sql_server_2022 < 16.0.1200.5`\n- `sql_server_2022 >= 16.0.4003.1, < 16.0.4275.2`\n- `sql_server_2025 < 17.0.1135.8`\n- `sql_server_2025 >= 17.0.4006.2, < 17.0.4085.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `sql_server_2022 16.0.4275.2`\n- `sql_server_2025 17.0.4085.5`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[{"seq":206543,"id":"CVE-2026-67643","ts":1789676918596,"field":"cvss","old":"8.8","new":"9.8"},{"seq":206542,"id":"CVE-2026-67643","ts":1789676918596,"field":"severity","old":"high","new":"critical"}]}