Lucene search
K
Catalog
Vendors
Products
Timeline
Vulnerabilities
Sources
Documentation
Blog
Glossary
FAQ
Brand assets
Assessment
Agents dashboard
Agent Scanning
API Scanning
Assessment API
Alerts
Email notifications
Webhook notifications
Alerts API
SBOM package analysis
API Reference
Support
Settings
Sign in

CVE-2026-23666

🗓️ 14 Apr 2026 16:57:53Reported by microsoftType 
cve
 cve🔗 web.nvd.nist.gov👁 27 Views

CVE-2026-23666 is a .NET Framework denial of service vulnerability.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-23666
14 Apr 202616:57
–attackerkb
Circl		CVE-2026-23666
14 Apr 202612:18
–circl
CNNVD		Microsoft .NET Framework 安全漏洞
14 Apr 202600:00
–cnnvd
CNVD		Microsoft .NET Framework Denial of Service Vulnerability
21 Apr 202600:00
–cnvd
Cvelist		CVE-2026-23666 .NET Framework Denial of Service Vulnerability
14 Apr 202616:57
–cvelist
EUVD		EUVD-2026-22363
14 Apr 202618:30
–euvd
Microsoft KB		April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5082398)
14 Apr 202614:00
–mskb
Microsoft KB		April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5082400)
14 Apr 202614:00
–mskb
Microsoft KB		April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 (KB5082402)
14 Apr 202614:00
–mskb
Microsoft KB		April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5082403)
14 Apr 202614:00
–mskb
Rows per page
NVD
Vulners
CNA
Node
microsoft.net_frameworkMatch3.5-
AND
microsoftwindows_server_2012Match-
OR
microsoftwindows_server_2012Matchr2
Node
microsoft.net_frameworkMatch3.5-
OR
microsoft.net_frameworkMatch4.7.2
AND
microsoftwindows_10_1809Match-arm64
OR
microsoftwindows_10_1809Match-x64
OR
microsoftwindows_10_1809Match-x86
Node
microsoft.net_frameworkMatch3.5-
OR
microsoft.net_frameworkMatch4.8
AND
microsoftwindows_10_1809Match-arm64
OR
microsoftwindows_10_1809Match-x64
OR
microsoftwindows_10_1809Match-x86
OR
microsoftwindows_10_21h2Match-arm64
OR
microsoftwindows_10_21h2Match-x64
OR
microsoftwindows_10_21h2Match-x86
OR
microsoftwindows_10_22h2Match-arm64
OR
microsoftwindows_10_22h2Match-x64
OR
microsoftwindows_10_22h2Match-x86
OR
microsoftwindows_server_2022Match-
Node
microsoft.net_frameworkMatch3.5-
OR
microsoft.net_frameworkMatch4.8.1
AND
microsoftwindows_10_21h2Match-arm64
OR
microsoftwindows_10_21h2Match-x64
OR
microsoftwindows_10_21h2Match-x86
OR
microsoftwindows_10_22h2Match-arm64
OR
microsoftwindows_10_22h2Match-x64
OR
microsoftwindows_10_22h2Match-x86
OR
microsoftwindows_11_22h2Match-arm64
OR
microsoftwindows_11_22h2Match-x64
OR
microsoftwindows_11_23h2Match-arm64
OR
microsoftwindows_11_23h2Match-x64
OR
microsoftwindows_11_24h2Match-arm64
OR
microsoftwindows_11_24h2Match-x64
OR
microsoftwindows_11_25h2Match-arm64
OR
microsoftwindows_11_25h2Match-x64
OR
microsoftwindows_11_26h1Match-arm64
OR
microsoftwindows_11_26h1Match-x64
OR
microsoftwindows_server_2022Match-
OR
microsoftwindows_server_2022_23h2Match-x64
OR
microsoftwindows_server_2025Match-x64
Node
microsoft.net_frameworkMatch4.6.2
OR
microsoft.net_frameworkMatch4.7
OR
microsoft.net_frameworkMatch4.7.1
OR
microsoft.net_frameworkMatch4.7.2
AND
microsoftwindows_server_2012Match-
OR
microsoftwindows_server_2012Matchr2
Node
microsoft.net_frameworkMatch4.8
AND
microsoftwindows_10_1607Match-x64
OR
microsoftwindows_10_1607Match-x86
OR
microsoftwindows_server_2012Match-
OR
microsoftwindows_server_2012Matchr2
[
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5",
    "platforms": [
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)"
    ],
    "versions": [
      {
        "version": "3.5.0",
        "lessThan": "2.0.50727.8982 & 3.0.30729.8976",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.7.2",
    "platforms": [
      "Windows 10 Version 1809 for 32-bit Systems",
      "Windows 10 Version 1809 for ARM64-based Systems",
      "Windows 10 Version 1809 for x64-based Systems"
    ],
    "versions": [
      {
        "version": "4.7.0",
        "lessThan": "2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.8",
    "platforms": [
      "Windows 10 Version 1809 for 32-bit Systems",
      "Windows 10 Version 1809 for ARM64-based Systems",
      "Windows 10 Version 1809 for x64-based Systems",
      "Windows 10 Version 21H2 for 32-bit Systems",
      "Windows 10 Version 21H2 for ARM64-based Systems",
      "Windows 10 Version 21H2 for x64-based Systems",
      "Windows 10 Version 22H2 for 32-bit Systems",
      "Windows 10 Version 22H2 for ARM64-based Systems",
      "Windows 10 Version 22H2 for x64-based Systems",
      "Windows Server 2022",
      "Windows Server 2022 (Server Core installation)"
    ],
    "versions": [
      {
        "version": "4.8.0",
        "lessThan": "2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.8.1",
    "platforms": [
      "Windows 10 Version 21H2 for 32-bit Systems",
      "Windows 10 Version 21H2 for ARM64-based Systems",
      "Windows 10 Version 21H2 for x64-based Systems",
      "Windows 10 Version 22H2 for 32-bit Systems",
      "Windows 10 Version 22H2 for ARM64-based Systems",
      "Windows 10 Version 22H2 for x64-based Systems",
      "Windows 11 Version 22H2 for ARM64-based Systems",
      "Windows 11 Version 22H2 for x64-based Systems",
      "Windows 11 Version 23H2 for ARM64-based Systems",
      "Windows 11 Version 23H2 for x64-based Systems",
      "Windows 11 Version 24H2 for ARM64-based Systems",
      "Windows 11 Version 24H2 for x64-based Systems",
      "Windows 11 Version 25H2 for ARM64-based Systems",
      "Windows 11 Version 25H2 for x64-based Systems",
      "Windows 11 Version 26H1 for ARM64-based Systems",
      "Windows 11 version 26H1 for x64-based Systems",
      "Windows Server 2022",
      "Windows Server 2022 (Server Core installation)",
      "Windows Server 2022, 23H2 Edition (Server Core installation)",
      "Windows Server 2025",
      "Windows Server 2025 (Server Core installation)"
    ],
    "versions": [
      {
        "version": "4.8.1",
        "lessThan": "2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
    "platforms": [
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)"
    ],
    "versions": [
      {
        "version": "4.7.0",
        "lessThan": "4.8.4801.0",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 4.8",
    "platforms": [
      "Windows 10 Version 1607 for 32-bit Systems",
      "Windows 10 Version 1607 for x64-based Systems",
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)"
    ],
    "versions": [
      {
        "version": "4.8.0",
        "lessThan": "4.8.4801.0",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

Book a live demo
01 Jun 2026 19:12Current
5.1Medium risk
Vulners AI Score5.1
CVSS 3.17.5
EPSS0.0013
SSVC
CWE-755
cve 2026 23666net framework vulnerabilitydenial of service
27