CVE-2021-1721

.NET Core and Visual Studio Denial of Service Vulnerability

Description

.NET Core and Visual Studio Denial of Service Vulnerability

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 4.77% Top 15%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)

Affected: Microsoft PowerShell Core 7.1

Affected: Microsoft PowerShell Core 7.0

Affected: Microsoft .NET Core 2.1

Affected: Microsoft .NET Core 3.1

Affected: Microsoft .NET 5.0

Affected: Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)

Affected: Microsoft Microsoft Visual Studio 2019 version 16.8

Affected: Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-1721?: CVE-2021-1721 has been scored as a medium severity vulnerability.
How to fix CVE-2021-1721?: To fix CVE-2021-1721, 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-2021-1721 being actively exploited in the wild?: It is possible that CVE-2021-1721 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1721?: CVE-2021-1721 affects Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6), Microsoft PowerShell Core 7.1, Microsoft PowerShell Core 7.0, Microsoft .NET Core 2.1, Microsoft .NET Core 3.1, Microsoft .NET 5.0, Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3), Microsoft Microsoft Visual Studio 2019 version 16.8, Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8).

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