CVE-2021-1684

Windows Bluetooth Security Feature Bypass Vulnerability

Description

Microsoft is aware of the "Impersonation in the Passkey Entry Protocol" vulnerability. For more information regarding the vulnerability, please see this statement from the Bluetooth SIG. To address the vulnerability, Microsoft has released a software update that will fail attempts to pair if the remote device exchanges a public key with the same X coordinate as the locally exchanged public key

5.0

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 3.17% Top 15%

Vendor Advisory microsoft.com

Affected: Microsoft Windows 10 Version 20H2

Affected: Microsoft Windows Server version 20H2

Affected: Microsoft Windows 10 Version 1803

Affected: Microsoft Windows 10 Version 1809

Affected: Microsoft Windows Server 2019

Affected: Microsoft Windows Server 2019 (Server Core installation)

Affected: Microsoft Windows 10 Version 1909

Affected: Microsoft Windows Server, version 1909 (Server Core installation)

Affected: Microsoft Windows 10 Version 2004

Affected: Microsoft Windows Server version 2004

Affected: Microsoft Windows 10 Version 1507

Affected: Microsoft Windows 10 Version 1607

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2016 (Server Core installation)

Affected: Microsoft Windows 8.1

Affected: Microsoft Windows Server 2012 R2

Affected: Microsoft Windows Server 2012 R2 (Server Core installation)

References

Link	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1684	vendor advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1684

Frequently Asked Questions

What is the severity of CVE-2021-1684?: CVE-2021-1684 has been scored as a medium severity vulnerability.
How to fix CVE-2021-1684?: To fix CVE-2021-1684, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-1684 being actively exploited in the wild?: It is possible that CVE-2021-1684 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1684?: CVE-2021-1684 affects Microsoft Windows 10 Version 20H2, Microsoft Windows Server version 20H2, Microsoft Windows 10 Version 1803, Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows 10 Version 1909, Microsoft Windows Server, version 1909 (Server Core installation), Microsoft Windows 10 Version 2004, Microsoft Windows Server version 2004, Microsoft Windows 10 Version 1507, Microsoft Windows 10 Version 1607, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows 8.1, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation).