---
id: "CVE-2023-38180"
kind: "vulnerability"
aliases: ["CVE-2023-38180"]
title: ".NET and Visual Studio Denial of Service Vulnerability"
severity: "high"
cvss: 7.5
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Microsoft .NET Core and Visual Studio", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft .net", "fixed": ["6.0.21"], "affected": ">= 6.0.0, < 6.0.21", "ecosystem": "vendor"}, {"name": "microsoft .net", "fixed": ["7.0.10"], "affected": ">= 7.0.0, < 7.0.10", "ecosystem": "vendor"}, {"name": "microsoft asp.net core", "fixed": ["2.1.40"], "affected": ">= 2.1, < 2.1.40", "ecosystem": "vendor"}, {"name": "microsoft visual studio 2022", "fixed": ["17.2.18"], "affected": ">= 17.2.0, < 17.2.18", "ecosystem": "vendor"}, {"name": "microsoft visual studio 2022", "fixed": ["17.4.10"], "affected": ">= 17.4.0, < 17.4.10", "ecosystem": "vendor"}, {"name": "microsoft visual studio 2022", "fixed": ["17.6.6"], "affected": ">= 17.6.0, < 17.6.6", "ecosystem": "vendor"}, {"name": "fedoraproject fedora", "fixed": [], "affected": "= 37", "ecosystem": "vendor"}, {"name": "fedoraproject fedora", "fixed": [], "affected": "= 38", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["dotnet", "exploited", "runtime", "visual-studio", "windows"]
not_affected_if: ["unknown"]
published_at: "2023-08-08T19:15:10+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-38180", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-38180", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# .NET and Visual Studio Denial of Service Vulnerability

Microsoft .NET Core and Visual Studio contain an unspecified flaw that lets an attacker cause a denial of service. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft .NET Core and Visual Studio affected ? fixed ?
- vendor:microsoft .net affected >= 6.0.0, < 6.0.21 fixed 6.0.21
- vendor:microsoft .net affected >= 7.0.0, < 7.0.10 fixed 7.0.10
- vendor:microsoft asp.net core affected >= 2.1, < 2.1.40 fixed 2.1.40
- vendor:microsoft visual studio 2022 affected >= 17.2.0, < 17.2.18 fixed 17.2.18
- vendor:microsoft visual studio 2022 affected >= 17.4.0, < 17.4.10 fixed 17.4.10
- vendor:microsoft visual studio 2022 affected >= 17.6.0, < 17.6.6 fixed 17.6.6
- vendor:fedoraproject fedora affected = 37 fixed ?
- vendor:fedoraproject fedora affected = 38 fixed ?

## Fix

Apply the mitigations from the vendor instructions, or stop using the affected product if no mitigation is available (per CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-38180
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-38180

## From the sources

Microsoft .NET Core and Visual Studio contain an unspecified vulnerability that allows for denial-of-service (DoS).

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_