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CVE-2021-43893

HIGHCVSS 7.5/10EPSS 6.62%

Last modified

CVE-2021-43893 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability. EPSS estimates a 6.62% chance of exploitation in the next 30 days.

Description

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
6.62%

93.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MicrosoftWindows 10All versions—
MicrosoftWindows 1020h2—
MicrosoftWindows 1021h1—
MicrosoftWindows 1021h2—
MicrosoftWindows 101607—
MicrosoftWindows 101809—
MicrosoftWindows 101909—
MicrosoftWindows 102004—
MicrosoftWindows 11All versions—
MicrosoftWindows 7All versionsSp1
MicrosoftWindows 8.1All versions—
MicrosoftWindows Rt 8.1All versions—
MicrosoftWindows Server20h2—
MicrosoftWindows Server2022—
MicrosoftWindows Server 2008r2Sp1
MicrosoftWindows Server 2012All versions—
MicrosoftWindows Server 2012r2—
MicrosoftWindows Server 2016All versions—
MicrosoftWindows Server 20162004—
MicrosoftWindows Server 2019All versions—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-43893?
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
How severe is CVE-2021-43893?
CVE-2021-43893 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 6.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43893?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43893?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST