← Back to CVE Explorer

CVE-2021-1636

Full vulnerability record from the local CVENow database.

Description

Microsoft SQL Elevation of Privilege Vulnerability

Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Modified
Source identifier
Published
2021-01-12 20:15:30.167000
Last modified
2026-11-02 18:18:32.740000
View original CVE JSON
{
  "id": "CVE-2021-1636",
  "sourceIdentifier": "[email protected]",
  "published": "2021-01-12T20:15:30.167",
  "lastModified": "2026-11-02T18:18:32.740",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft SQL Elevation of Privilege Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una Vulnerabilidad de Elevación de Privilegios de Microsoft SQL"
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2012 Service Pack 4 (QFE)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2012:sp4:*:*:*:*:*:*"
          ],
          "platforms": [
            "32-bit Systems"
          ],
          "versions": [
            {
              "version": "11.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2012 for x64-based Systems Service Pack 4 (QFE)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2012:sp4:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "11.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2017 (GDR)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2017:-:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "14.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2014 Service Pack 3 (GDR)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:x64:*",
            "cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:x86:*"
          ],
          "platforms": [
            "x64-based Systems",
            "32-bit Systems"
          ],
          "versions": [
            {
              "version": "12.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2016 for x64-based Systems Service Pack 2 (GDR)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2016:sp2:*:*:*:*:x64:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "versions": [
            {
              "version": "13.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2014 Service Pack 3 (CU 4)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:x86:*",
            "cpe:2.3:a:microsoft:sql_server:2014:sp3:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "12.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2017 (CU 22)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2017:-:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "14.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2016 Service Pack 2 (CU 15)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2016:sp2:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "13.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2019 (CU 8)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2019:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "16.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft SQL Server 2019 (GDR)",
          "cpes": [
            "cpe:2.3:a:microsoft:sql_server:2019:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "15.0.0",
              "lessThan": "publication",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "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": "[email protected]",
        "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": "[email protected]",
        "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"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ]
    }
  ],
  "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"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1636",
      "source": "[email protected]"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1636",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}