CVE-2021-26423

Published: Aug 12, 2021

Modified: May 28, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

.NET Core and Visual Studio Denial of Service Vulnerability

Vendor	Product	Versions
Microsoft	Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)	affected `15.9.0 - < 15.9.38`
Microsoft	Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)	affected `16.0 - < 16.4.25`
Microsoft	Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)	affected `16.0.0 - < 16.7.18`
Microsoft	Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)	affected `15.0.0 - < 16.9.10`
Microsoft	Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)	affected `16.10.0 - < 16.10.5`
Microsoft	Visual Studio 2019 for Mac version 8.10	affected `8.1.0 - < 8.10.7`
Microsoft	.NET Core 2.1	affected `2.1 - < 2.1.30`
Microsoft	.NET Core 3.1	affected `3.1 - < 3.1.18`
Microsoft	.NET 5.0	affected `5.0.0 - < 5.0.9`
Microsoft	PowerShell Core 7.1	affected `7.1.0 - < 7.1.4`
Microsoft	PowerShell Core 7.0	affected `7.0.0 - < 7.0.7`

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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