{"identifier":"CVE-2021-1636","cve":{"id":"CVE-2021-1636","description":"Microsoft SQL Elevation of Privilege Vulnerability","published":"2021-01-12T20:15:30.167000+00:00","modified":"2026-11-02T18:18:32.740000+00:00","status":"Modified","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:microsoft:sql_server:2012:sp4:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""},{"criteria":"cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""},{"criteria":"cpe:2.3:a:microsoft:sql_server:2016:sp2:*:*:*:*:x64:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""},{"criteria":"cpe:2.3:a:microsoft:sql_server:2017:-:*:*:*:*:x64:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""},{"criteria":"cpe:2.3:a:microsoft:sql_server:2019:*:*:*:*:*:x64:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""}],"weaknesses":["CWE-89"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1636","source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1636","source":"af854a3a-2127-422b-91ae-364da2661108"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"secure@microsoft.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:P/I:P/A:P","baseScore":6.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-11-02T17:58:38.273449Z","id":"CVE-2021-1636","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server:2012:sp4:*:*:*:*:*:*","matchCriteriaId":"D7BD8F6C-FD88-483F-95E8-16F7A6BCFCC5"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:*:*","matchCriteriaId":"03C65D96-44D0-4411-8B84-961973F1E4D0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server:2016:sp2:*:*:*:*:x64:*","matchCriteriaId":"CDCE78A8-26F9-4F9E-BDDD-E59DEA4A3791"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server:2017:-:*:*:*:*:x64:*","matchCriteriaId":"C0593463-9AE4-4D83-8037-FFD24AD3CFBD"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sql_server:2019:*:*:*:*:*:x64:*","matchCriteriaId":"9144F644-A3D4-440C-8978-257E71204617"}]}]}],"source":"nvd","retrieved_at":"2026-11-02T21:31:21.170090+00:00","exploited":false,"kev_stale":false,"products":["microsoft / sql server"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence.","Fresh EPSS data is unavailable; missing values are not zero."]},"epss":null,"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"msrc.microsoft.com","source_url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1636","investigate_url":"https://investigate.aeglixmind.com/#msrc.microsoft.com"},{"domain":"portal.msrc.microsoft.com","source_url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1636","investigate_url":"https://investigate.aeglixmind.com/#portal.msrc.microsoft.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2021-1636","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2021-1636","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2021-1636","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}