Vulnerability in Microsoft Windows 10
CVE-2021-43893
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.066 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.066 · newest: 0.066 · change: 0.000
Affected products
- Microsoft Windows 10 — versions 20h2, 21h1, 21h2
- Microsoft Windows 10 Version 1507 — versions 10.0.0
- Microsoft Windows 10 Version 1607 — versions 10.0.0
- Microsoft Windows 10 Version 1809 — versions 10.0.0
- Microsoft Windows 10 Version 1909 — versions 10.0.0
- Microsoft Windows 10 Version 2004 — versions 10.0.0
- Microsoft Windows 10 Version 20h2 — versions 10.0.0
- Microsoft Windows 10 Version 21h1 — versions 10.0.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.0
- Microsoft Windows 11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893 (Patch, Vendor Advisory)
- packetstormsecurity.com/files/165560/Microsoft-Windows-EFSRPC-Arbitrary-File-Up… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43893?
- CVE-2021-43893 is a high-severity vulnerability in Microsoft Windows 10, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.5/10. Published 2021-12-15.
- How severe is CVE-2021-43893?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-43893 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.