Home/CVE/Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
CVE

CVE-2021-43893

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability.

HIGH · CVSS 7.5 EPSS 0.06763
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  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-668Exposure of Resource to Wrong Sphere
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Affected Products & Versions

10
microsoft windows 10all versions
microsoft windows 11all versions
microsoft windows 7all versions
microsoft windows 8.1all versions
microsoft windows rt 8.1all versions
microsoft windows serverall versions
microsoft windows server 2008all versions
microsoft windows server 2012all versions
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Public Exploits & PoCs

1
pocpacketstormsecurity.com · Microsoft-Windows-EFSRPC-Arbitrary-File-Upload-Privilege-...packetstormsecurity.com
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Dec 2021 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
msrcCVE-2021-43893Elevation of Privilege
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893PatchVendor Advisory
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