{"containers": {"cna": {"title": "Windows Kernel Elevation of Privilege Vulnerability", "datePublic": "2021-07-13T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.2061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.17763.2061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.2061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.2061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.18363.1679"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21H1:*:*:*:*:*:*:x64:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.19043.1110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.19041.1110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.19041.1110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_20H2:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.19042.1110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_20H2:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.19042.1110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.10240.0", "versionEndExcluding": "10.0.10240.19003"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.4530"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.4530"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.4530"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x86:*", "versionStartIncluding": "6.3.0", "versionEndExcluding": "6.3.9600.20069"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.3.9600.0", "versionEndExcluding": "6.3.9600.20069"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.3.9600.0", "versionEndExcluding": "6.3.9600.20069"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Windows 10 Version 1507", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "10.0.10240.0", "lessThan": "10.0.10240.19003", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1607", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "platforms": ["ARM64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.17763.2061", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1909", "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.18363.1679", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 2004", "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.19041.1110", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 20H2", "platforms": ["32-bit Systems", "ARM64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.19042.1110", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 10 Version 21H1", "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.19043.1110", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows 8.1", "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "versions": [{"version": "6.3.0", "lessThan": "6.3.9600.20069", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2012 R2", "platforms": ["x64-based Systems"], "versions": [{"version": "6.3.9600.0", "lessThan": "6.3.9600.20069", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2012 R2 (Server Core installation)", "platforms": ["x64-based Systems"], "versions": [{"version": "6.3.9600.0", "lessThan": "6.3.9600.20069", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2016", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2016 (Server Core installation)", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2019", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server 2019 (Server Core installation)", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server version 2004", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.19041.1110", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Windows Server version 20H2", "platforms": ["x64-based Systems"], "versions": [{"version": "10.0.0", "lessThan": "10.0.19042.1110", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Windows Kernel Elevation of Privilege Vulnerability", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "Elevation of Privilege", "lang": "en-US", "type": "Impact"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-08-10T15:11:03.772Z"}, "references": [{"name": "Windows Kernel Elevation of Privilege Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33771"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C"}}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T23:58:23.153Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33771"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-33771", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-02-06T15:34:13.481047Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "timeline": [{"time": "2021-11-03T00:00:00.000Z", "lang": "en", "value": "CVE-2021-33771 added to CISA KEV"}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-21T23:25:41.059Z"}}]}, "cveMetadata": {"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "assignerShortName": "microsoft", "cveId": "CVE-2021-33771", "datePublished": "2021-07-14T17:53:43.000Z", "dateReserved": "2021-05-28T00:00:00.000Z", "dateUpdated": "2026-08-10T15:11:03.772Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33771", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T23:58:23.153Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-33771", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-02-06T15:34:13.481047Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771"}}}], "timeline": [{"lang": "en", "time": "2021-11-03T00:00:00.000Z", "value": "CVE-2021-33771 added to CISA KEV"}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-04T19:07:45.634Z"}}], "cna": {"title": "Windows Kernel Elevation of Privilege Vulnerability", "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C"}, "scenarios": [{"lang": "en-US", "value": "GENERAL"}]}], "affected": [{"vendor": "Microsoft", "product": "Windows 10 Version 1507", "versions": [{"status": "affected", "version": "10.0.10240.0", "lessThan": "10.0.10240.19003", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1607", "versions": [{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "versions": [{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["ARM64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1909", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.18363.1679", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 2004", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19041.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 20H2", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19042.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 21H1", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19043.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 8.1", "versions": [{"status": "affected", "version": "6.3.0", "lessThan": "6.3.9600.20069", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2012 R2", "versions": [{"status": "affected", "version": "6.3.9600.0", "lessThan": "6.3.9600.20069", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2012 R2 (Server Core installation)", "versions": [{"status": "affected", "version": "6.3.9600.0", "lessThan": "6.3.9600.20069", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2016", "versions": [{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2016 (Server Core installation)", "versions": [{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.4530", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2019", "versions": [{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2019 (Server Core installation)", "versions": [{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server version 2004", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19041.1110", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server version 20H2", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19042.1110", "versionType": "custom"}], "platforms": ["x64-based Systems"]}], "datePublic": "2021-07-13T14:00:00.000Z", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33771", "name": "Windows Kernel Elevation of Privilege Vulnerability", "tags": ["vendor-advisory", "patch"]}], "descriptions": [{"lang": "en-US", "value": "Windows Kernel Elevation of Privilege Vulnerability"}], "problemTypes": [{"descriptions": [{"lang": "en-US", "type": "Impact", "description": "Elevation of Privilege"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "10.0.17763.2061", "versionStartIncluding": "10.0.17763.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*", "vulnerable": true, "versionEndExcluding": "10.0.17763.2061", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.17763.2061", "versionStartIncluding": "10.0.17763.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.17763.2061", "versionStartIncluding": "10.0.17763.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "10.0.18363.1679", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21H1:*:*:*:*:*:*:x64:*", "vulnerable": true, "versionEndExcluding": "10.0.19043.1110", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "vulnerable": true, "versionEndExcluding": "10.0.19041.1110", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.19041.1110", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_20H2:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "10.0.19042.1110", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_20H2:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.19042.1110", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "10.0.10240.19003", "versionStartIncluding": "10.0.10240.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "10.0.14393.4530", "versionStartIncluding": "10.0.14393.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.14393.4530", "versionStartIncluding": "10.0.14393.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.0.14393.4530", "versionStartIncluding": "10.0.14393.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x86:*", "vulnerable": true, "versionEndExcluding": "6.3.9600.20069", "versionStartIncluding": "6.3.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "vulnerable": true, "versionEndExcluding": "6.3.9600.20069", "versionStartIncluding": "6.3.9600.0"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "vulnerable": true, "versionEndExcluding": "6.3.9600.20069", "versionStartIncluding": "6.3.9600.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-08-10T15:11:03.772Z"}}}, "cveMetadata": {"cveId": "CVE-2021-33771", "state": "PUBLISHED", "dateUpdated": "2026-08-10T15:11:03.772Z", "dateReserved": "2021-05-28T00:00:00.000Z", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "datePublished": "2021-07-14T17:53:43.000Z", "assignerShortName": "microsoft"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Windows 10 Version 1507", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.10240.19003", "status": "affected", "version": "10.0.10240.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Windows 10 Version 1607", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.14393.4530", "status": "affected", "version": "10.0.14393.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Windows 10 Version 1809", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.17763.2061", "status": "affected", "version": "10.0.17763.0", "versionType": "custom"}]}, {"platforms": ["ARM64-based Systems"], "product": "Windows 10 Version 1809", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.17763.2061", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "product": "Windows 10 Version 1909", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.18363.1679", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "product": "Windows 10 Version 2004", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.19041.1110", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "ARM64-based Systems"], "product": "Windows 10 Version 20H2", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.19042.1110", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "product": "Windows 10 Version 21H1", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.19043.1110", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"], "product": "Windows 8.1", "vendor": "Microsoft", "versions": [{"lessThan": "6.3.9600.20069", "status": "affected", "version": "6.3.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2012 R2", "vendor": "Microsoft", "versions": [{"lessThan": "6.3.9600.20069", "status": "affected", "version": "6.3.9600.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2012 R2 (Server Core installation)", "vendor": "Microsoft", "versions": [{"lessThan": "6.3.9600.20069", "status": "affected", "version": "6.3.9600.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2016", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.14393.4530", "status": "affected", "version": "10.0.14393.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2016 (Server Core installation)", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.14393.4530", "status": "affected", "version": "10.0.14393.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2019", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.17763.2061", "status": "affected", "version": "10.0.17763.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server 2019 (Server Core installation)", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.17763.2061", "status": "affected", "version": "10.0.17763.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server version 2004", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.19041.1110", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Windows Server version 20H2", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.19042.1110", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}], "source": "[email protected]"}], "cisaActionDue": "2021-11-17", "cisaExploitAdd": "2021-11-03", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Microsoft Windows Kernel Privilege Escalation Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*", "matchCriteriaId": "0C51CD3A-E78B-4A0D-8716-4F2C0A79ED68", "versionEndExcluding": "10.0.10240.19003", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*", "matchCriteriaId": "9EEBF8AC-AB6E-4F62-811A-0E53721C78F5", "versionEndExcluding": "10.0.14393.4530", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*", "matchCriteriaId": "5BAABE12-C0E8-4E34-9EFE-18DD50C54B1D", "versionEndExcluding": "10.0.17763.2061", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*", "matchCriteriaId": "1C9E359B-5719-48B1-BABB-618744C73388", "versionEndExcluding": "10.0.18363.1679", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*", "matchCriteriaId": "307C13CF-563B-46D1-9F2E-227AB9C40720", "versionEndExcluding": "10.0.19041.1110", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*", "matchCriteriaId": "9AEC53C7-C1CB-4FFB-8069-27604FB50F0B", "versionEndExcluding": "10.0.19042.1110", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*", "matchCriteriaId": "765BA052-1B41-4CD3-98E6-F3750E0466E5", "versionEndExcluding": "10.0.19043.1110", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*", "matchCriteriaId": "E93068DB-549B-45AB-8E5C-00EB5D8B5CF8", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*", "matchCriteriaId": "C6CE5198-C498-4672-AF4C-77AB4BE06C5C", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*", "matchCriteriaId": "A73D95E0-7290-4049-ACA6-7071B6ECAB8D", "versionEndExcluding": "10.0.19041.1110", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:*", "matchCriteriaId": "5F2558DF-2D1F-46BA-ABF1-08522D33268E", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "matchCriteriaId": "9127CF36-6B37-4698-BB02-2AC6D853EB6F", "versionEndExcluding": "10.0.14393.4530", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "matchCriteriaId": "77FA5A89-9F88-48FB-B632-76433EDBA95F", "versionEndExcluding": "10.0.17763.2061", "vulnerable": true}, {"criteria": "cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*", "matchCriteriaId": "C210CB34-3DA4-4273-BF7C-F2692173E180", "versionEndExcluding": "10.0.19042.1110", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Windows Kernel Elevation of Privilege Vulnerability"}, {"lang": "es", "value": "Una vulnerabilidad de Elevaci\u00f3n de Privilegios en Windows Kernel. Este ID de CVE es diferente de CVE-2021-31979, CVE-2021-34514"}], "id": "CVE-2021-33771", "lastModified": "2026-08-10T19:58:46.650", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "[email protected]", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-33771", "options": [{"exploitation": "active"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-02-06T15:34:13.481047Z", "version": "2.0.3"}}]}, "published": "2021-07-14T18:15:10.483", "references": [{"source": "[email protected]", "tags": ["Patch", "Vendor Advisory"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33771"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33771"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "[email protected]", "type": "Primary"}]}

{}

{}