{"id":"CVE-2026-20803","title":"Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.","summary":"Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-306"],"vendor":"microsoft","product":"sql_server_2022","affected":["sql_server_2022 >= 16.0.1000.6, < 16.0.1165.1","sql_server_2022 >= 16.0.4003.1, < 16.0.4230.2","sql_server_2025 = 17.0.1000.7"],"patched":["sql_server_2022 16.0.4230.2"],"published":"2026-01-13","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20803","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803","label":"secure@microsoft.com"}],"tags":["nvd"],"epss":0.01267,"epssPercentile":0.68505,"ingestedAt":"2026-07-31T06:58:51.089Z","slug":"CVE-2026-20803","body":"## Overview\n\nMissing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.\n\n## Affected\n\n- `sql_server_2022 >= 16.0.1000.6, < 16.0.1165.1`\n- `sql_server_2022 >= 16.0.4003.1, < 16.0.4230.2`\n- `sql_server_2025 = 17.0.1000.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `sql_server_2022 16.0.4230.2`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}