CVE-2021-43893

HIGH

Windows Encrypting File System - Privilege Escalation

Title source: llm

Description

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

References (2)

[Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/165560/Microsoft-Windows-EFSRPC-Arbitrary-File-Upload-Privilege-Escalation.html

[Patch, Vendor Advisory] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893

Scores

CVSS v3 7.5

EPSS 0.0676

EPSS Percentile 91.2%

Attack Vector NETWORK

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

Classification

CWE

CWE-668

Status published

Affected Products (39)

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

microsoft/windows_10

... and 24 more

Timeline

Published Dec 15, 2021

Tracked Since Feb 18, 2026