Vulnerability Intelligence Report
ASP.NET Core and Visual Studio Denial of Service Vulnerability
CVE-2021-1723
ASP.NET Core and Visual Studio Denial of Service Vulnerability
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:4.91%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
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Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | ASP.NET Core 3.1 | 3.0 < publication (affected) |
| Microsoft | ASP.NET Core 5.0 | 5.0 < 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 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 < publication (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
4.908%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2020-12-02T00:00:00 |
| Published | 2021-01-12T19:42:47 |
| Patch Date | 2021-01-12 |
| Last Updated | 2026-05-28T18:48:20 |
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