Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
CVE-2021-43893

7.5HIGH

Key Information:

Vendor
Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows 10 Version 1909
Vendor
CVE Published:
15 December 2021

Badges

👾 Exploit Exists🟡 Public PoC

Summary

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.0 < 10.0.10240.19145

Windows 10 Version 1607 32-bit Systems 10.0.0 < 10.0.14393.4825

Windows 10 Version 1809 32-bit Systems 10.0.0 < 10.0.17763.2366

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

blankspace
Created by jbaines-r7

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC
http://packetstormsecurity.com/files/165560/Microsoft-Win...
x_refsource_MISC

EPSS Score

0% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database1 Proof of Concept(s)
.