CVE-2026-23666
Analyzed Analyzed - Analysis Complete
Race Condition in .NET Framework Causes Remote Denial of Service

Publication date: 2026-04-14

Last updated on: 2026-05-07

Assigner: Microsoft Corporation

Description
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-04-14
Last Modified
2026-05-07
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23666
EUVD
EUVD-2026-22363
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
microsoft .net_framework 3.5
microsoft .net_framework 4.7.2
microsoft .net_framework 4.8
microsoft .net_framework 4.8.1
microsoft .net_framework 4.6.2
microsoft .net_framework 4.7
microsoft .net_framework 4.7.1
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-755 The product does not handle or incorrectly handles an exceptional condition.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability is a race condition in the .NET Framework caused by concurrent execution using a shared resource without proper synchronization.

An unauthorized attacker can exploit this flaw to cause a denial of service over a network.

Impact Analysis

The vulnerability can be exploited by an attacker to cause a denial of service (DoS) condition, making the affected .NET Framework service unavailable to legitimate users.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-23666. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart