CVE-2021-43893
HighPublished
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
- Published
- Dec 15, 2021
- Updated
- Aug 4, 2024
- Assigning CNA
- microsoft
- Evidence observed
- Aug 25, 2026
Primary CVSS
7.5/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H6.6%
Low · next 30 days
- Percentile
- 93.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
Sources
1- blankspacePoC
Proof of Concept for EFSRPC Arbitrary File Upload (CVE-2021-43893)
Responsible use
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