CVE-2021-43226

Highest-risk unexploited with PoCs

Exploit code exists, no confirmed in-the-wild activity, ranked by EPSS

Actively Exploited

Confirmed exploited in the wild, sorted by most recently updated

CVSS 7.8EPSS 3%

Published 2021-12-15Updated 2025-10-06

Exploited in the wild

Vulnerability details

Windows Common Log File System Driver Elevation of Privilege Vulnerability

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

CNAmicrosoft

EPSS score history

Sources

2 links

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CISA Known Exploited CVE Organization

Profile

CVSS

7.8

EPSS

Published

2021-12-15

Updated

2025-10-06

CNA

microsoft

Vendors

Microsoft

28 products

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:*

cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2366:*:*:*:*:*:*:*

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:*

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:*

cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.405:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1415:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1415:*:*:*:*:*:*:*

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:*

cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1415:*:*:*:*:*:*:*

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:*

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:*

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:*

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:*

cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4825:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_7:6.1.7601.25796:sp1:*:*:*:*:x64:*

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:*:*:*:*:*:*:*

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:*

cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25796:*:*:*:*:*:x64:*

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:*

cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20207:*:*:*:*:*:x64:*

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