Vulnerability Intelligence Report
.NET Core and Visual Studio Denial of Service Vulnerability
CVE-2021-1721
.NET Core and Visual Studio Denial of Service Vulnerability
No Active Exploit Signals
CVSS Base Score
6.5
MEDIUM
Exploitability:2.9
Impact Score:3.6
EPSS Probability:3.34%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 < publication (affected) |
| Microsoft | PowerShell Core 7.1 | 7.1.0 < publication (affected) |
| Microsoft | PowerShell Core 7.0 | 7.0.0 < publication (affected) |
| Microsoft | .NET Core 2.1 | 2.1 < publication (affected) |
| Microsoft | .NET Core 3.1 | 3.1 < publication (affected) |
| Microsoft | .NET 5.0 | 5.0.0 < publication (affected) |
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | 16.0 < publication (affected) |
| Microsoft | Microsoft Visual Studio 2019 version 16.8 | 16.0 < publication (affected) |
| Microsoft | Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) | 15.9.0 < publication (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
3.340%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2020-12-02T00:00:00 |
| Published | 2021-02-25T23:01:26 |
| Patch Date | 2021-02-09 |
| Last Updated | 2026-05-28T19:30:20 |
Community Chatter & Buzz