CVE-2021-43207

HIGH EXPLOITED IN THE WILD RANSOMWARE

Windows Common Log File System Driver - Privilege Escalation

Title source: llm

CVE-2021-43207 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io), including in ransomware campaigns.

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Core 1

Core References

Patch, Vendor Advisory x_refsource_misc

CVSS v3 7.8

EPSS 0.0063

EPSS Percentile 46.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

VulnCheck KEV 2022-06-13

InTheWild.io 2022-06-13

Ransomware Use Confirmed

Status published

Products (19)

microsoft/windows_10 (2 CPE variants)

microsoft/windows_10 20h2 (3 CPE variants)

microsoft/windows_10 21h1 (3 CPE variants)

microsoft/windows_10 1607 (2 CPE variants)

microsoft/windows_10 1809 (3 CPE variants)

microsoft/windows_10 1909 (3 CPE variants)

microsoft/windows_10 2004 (3 CPE variants)

microsoft/windows_11 (2 CPE variants)

microsoft/windows_7 (2 CPE variants)

microsoft/windows_8.1 (2 CPE variants)

... and 9 more

Published Dec 15, 2021

Tracked Since Feb 18, 2026