CVE-2021-43226 (GCVE-0-2021-43226)

Vulnerability from cvelistv5 – Published: 2021-12-15 14:15 – Updated: 2025-10-21 23:25
VLAI CISA KEV
Title
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Summary
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.0 , < 10.0.17763.2366 (custom)
    cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:arm64:*
 Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.0 , < 10.0.17763.2366 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2366:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.0 , < 10.0.17763.2366 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2366:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1909 Affected: 10.0.0 , < 10.0.18363.1977 (custom)
    cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1977:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1977:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1809:10.0.18363.1977:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows 10 Version 21H1 Affected: 10.0.0 , < 10.0.19043.1415 (custom)
    cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:arm64:*
    cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.0 , < 10.0.20348.405 (custom)
    cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.405:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 2004 Affected: 10.0.0 , < 10.0.19041.1415 (custom)
    cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1415:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server version 2004 Affected: 10.0.0 , < 10.0.19041.1415 (custom)
    cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1415:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 20H2 Affected: 10.0.0 , < 10.0.19042.1415 (custom)
    cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1415:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1415:*:*:*:*:*:arm64:*
 Create a notification for this product.
Microsoft Windows Server version 20H2 Affected: 10.0.0 , < 10.0.19042.1415 (custom)
    cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1415:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 11 version 21H2 Affected: 10.0.0 , < 10.0.22000.376 (custom)
    cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:arm64:*
 Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.0 , < 10.0.19044.1415 (custom)
    cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:arm64:*
    cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows 10 Version 1507 Affected: 10.0.0 , < 10.0.10240.19145 (custom)
    cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows 10 Version 1607 Affected: 10.0.0 , < 10.0.14393.4825 (custom)
    cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.0 , < 10.0.14393.4825 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.0 , < 10.0.14393.4825 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 7 Affected: 6.1.0 , < 6.1.7601.25796 (custom)
    cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows 7 Service Pack 1 Affected: 6.1.0 , < 6.1.7601.25796 (custom)
    cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows 8.1 Affected: 6.3.0 , < 6.3.9600.20207 (custom)
    cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20207:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20207:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20207:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21309 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.0 , < 6.0.6003.21309 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21309 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.0 , < 6.1.7601.25796 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25796:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.0.0 , < 6.1.7601.25796 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25796:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 Affected: 6.2.0 , < 6.2.9200.23545 (custom)
Affected: 6.2.0 , < 6.2.9200.23540 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23545:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23540:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.0 , < 6.2.9200.23545 (custom)
Affected: 6.2.0 , < 6.2.9200.23540 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23545:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23540:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.0 , < 6.3.9600.20207 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20207:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.0 , < 6.3.9600.20207 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20207:*:*:*:*:*:x64:*
 Create a notification for this product.
Date Public
2021-12-14 08:00
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6c652996-42e8-4fec-a12e-751f9915b7b9

Vulnerability ID: CVE-2021-43226

Status: Confirmed

Status Updated: 2025-10-06 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-10-06
Asserted: 2025-10-06
Scope
Notes: KEV entry: Microsoft Windows Privilege Escalation Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-10-27 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43226 ; https://nvd.nist.gov/vuln/detail/CVE-2021-43226
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes
Feed CISA Known Exploited Vulnerabilities Catalog
Product Windows
Due Date 2025-10-27
Date Added 2025-10-06
Vendorproject Microsoft
Vulnerabilityname Microsoft Windows Privilege Escalation Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 13:24 UTC | Updated: 2026-02-06 07:53 UTC
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
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        "metrics": [
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                "id": "CVE-2021-43226",
                "options": [
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                  },
                  {
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-04T03:55:25.776895Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          },
          {
            "other": {
              "content": {
                "dateAdded": "2025-10-06",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-43226"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
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        "references": [
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            "tags": [
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            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-43226"
          }
        ],
        "timeline": [
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            "lang": "en",
            "time": "2025-10-06T00:00:00.000Z",
            "value": "CVE-2021-43226 added to CISA KEV"
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        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
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            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43226"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2366:*:*:*:*:*:arm64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.2366",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2366:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
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          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2366:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.2366",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1977:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1977:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.18363.1977:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 1909",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.18363.1977",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:arm64:*",
            "cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:x86:*"
          ],
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 21H1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19043.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.405:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.405",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1415:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 2004",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19041.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1415:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server version 2004",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19041.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1415:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1415:*:*:*:*:*:arm64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 20H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19042.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1415:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server version 20H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19042.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:arm64:*"
          ],
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22000.376",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:arm64:*",
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1507",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.10240.19145",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4825",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4825",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4825",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x86:*"
          ],
          "platforms": [
            "32-bit Systems"
          ],
          "product": "Windows 7",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.25796",
              "status": "affected",
              "version": "6.1.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 7 Service Pack 1",
          "vendor": "Microsoft",
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\"10.0.0\", \"lessThan\": \"10.0.19043.1415\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\", \"ARM64-based Systems\", \"32-bit Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.405:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2022\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.20348.405\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1415:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 10 Version 2004\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.19041.1415\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"ARM64-based Systems\", \"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1415:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 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[\"cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:arm64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 11 version 21H2\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.22000.376\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\", \"ARM64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x86:*\", \"cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:arm64:*\", \"cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 10 Version 21H2\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.19044.1415\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"ARM64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x86:*\", \"cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19145:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 10 Version 1507\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.10240.19145\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x86:*\", \"cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4825:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 10 Version 1607\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.14393.4825\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2016\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.14393.4825\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2016 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.14393.4825\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 7\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25796\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 7 Service Pack 1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25796\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20207:*:*:*:*:*:x86:*\", \"cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20207:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20207:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 8.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20207\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\", \"ARM64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 Service Pack 2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21309\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 Service Pack 2 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21309\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21309:*:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008  Service Pack 2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21309\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25796:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 R2 Service Pack 1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25796\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25796:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 R2 Service Pack 1 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.1.7601.25796\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23545:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23540:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23545\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23540\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23545:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23540:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23545\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23540\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20207:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 R2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20207\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20207:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 R2 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20207\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}], \"datePublic\": \"2021-12-14T08:00:00.000Z\", \"references\": [{\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43226\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"Windows Common Log File System Driver Elevation of Privilege Vulnerability\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"Impact\", \"description\": \"Elevation of Privilege\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2024-05-29T14:44:20.762Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-43226\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:25:22.540Z\", \"dateReserved\": \"2021-11-02T00:00:00.000Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2021-12-15T14:15:12.000Z\", \"assignerShortName\": \"microsoft\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.