Net Core
CVE-2021-31957
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
ASP.NET Core Denial of Service Vulnerability. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Affected products include: Microsoft .Net, Microsoft .Net Core, Microsoft Visual Studio 2019, Fedoraproject Fedora.
Know when Net Core gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
DescriptionCVE.org
ASP.NET Core Denial of Service Vulnerability
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the softwar
A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests, aka '.NET Cor
A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a fi
A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a fi
.NET Core Remote Code Execution Vulnerability. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitabl
.NET and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely e
.NET Core and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remot
.NET Core Remote Code Execution Vulnerability. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitabl
.NET and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely e
.NET Core and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remot
NuGet Client Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack comp
.NET and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely e
GitHub PoC
Exploit-DB