VulnerabilityModified
CVE-2021-43893
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
HIGH 7.5EPSS 6.62%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 6.62% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-668
- Affected
- microsoft/windows 10 · microsoft/windows 11 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
- Source
- secure@microsoft.com
References
- http://packetstormsecurity.com/files/165560/Microsoft-Windows-EFSRPC-Arbitrary-File-Upload-Privilege-Escalation.htmlThird Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893Patch, Vendor Advisory
- http://packetstormsecurity.com/files/165560/Microsoft-Windows-EFSRPC-Arbitrary-File-Upload-Privilege-Escalation.htmlThird Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.