Vulnerability-Lookup

CNVD-2026-18592

Vulnerability from cnvd - Published: 2026-04-21

Title

Microsoft .NET Framework拒绝服务漏洞

Description

Microsoft .NET Framework是美国微软（Microsoft）公司的一种全面且一致的编程模型，也是一个用于构建Windows、Windows Store、Windows Phone、Windows Server和Microsoft Azure的应用程序的开发平台。该平台包括C#和Visual Basic编程语言、公共语言运行库和广泛的类库。 Microsoft .NET Framework存在安全漏洞。攻击者可利用该漏洞导致系统拒绝服务。

Severity

高

Patch Name

Microsoft .NET Framework拒绝服务漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666

Reference

https://access.redhat.com/security/cve/cve-2026-23666

Impacted products

Name
['Microsoft Windows Server 2012', 'Microsoft Windows Server 2022', 'Microsoft Windows Server 2012 R2', 'Microsoft Window 10 22H2', 'Microsoft Window 10 21H2', 'Microsoft Window 10 1809', 'Microsoft Window 10 1607']

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-23666",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-23666"
    }
  },
  "description": "Microsoft .NET Framework\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u79cd\u5168\u9762\u4e14\u4e00\u81f4\u7684\u7f16\u7a0b\u6a21\u578b\uff0c\u4e5f\u662f\u4e00\u4e2a\u7528\u4e8e\u6784\u5efaWindows\u3001Windows Store\u3001Windows Phone\u3001Windows Server\u548cMicrosoft Azure\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u5305\u62ecC#\u548cVisual Basic\u7f16\u7a0b\u8bed\u8a00\u3001\u516c\u5171\u8bed\u8a00\u8fd0\u884c\u5e93\u548c\u5e7f\u6cdb\u7684\u7c7b\u5e93\u3002\n\nMicrosoft .NET Framework\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7cfb\u7edf\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-18592",
  "openTime": "2026-04-21",
  "patchDescription": "Microsoft .NET Framework\u662f\u7f8e\u56fd\u5fae\u8f6f\uff08Microsoft\uff09\u516c\u53f8\u7684\u4e00\u79cd\u5168\u9762\u4e14\u4e00\u81f4\u7684\u7f16\u7a0b\u6a21\u578b\uff0c\u4e5f\u662f\u4e00\u4e2a\u7528\u4e8e\u6784\u5efaWindows\u3001Windows Store\u3001Windows Phone\u3001Windows Server\u548cMicrosoft Azure\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u5305\u62ecC#\u548cVisual Basic\u7f16\u7a0b\u8bed\u8a00\u3001\u516c\u5171\u8bed\u8a00\u8fd0\u884c\u5e93\u548c\u5e7f\u6cdb\u7684\u7c7b\u5e93\u3002\r\n\r\nMicrosoft .NET Framework\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7cfb\u7edf\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Microsoft .NET Framework\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Microsoft Windows Server 2012",
      "Microsoft Windows Server 2022",
      "Microsoft Windows Server 2012 R2",
      "Microsoft Window 10 22H2",
      "Microsoft Window 10 21H2",
      "Microsoft Window 10 1809",
      "Microsoft Window 10 1607"
    ]
  },
  "referenceLink": "https://access.redhat.com/security/cve/cve-2026-23666",
  "serverity": "\u9ad8",
  "submitTime": "2026-04-21",
  "title": "Microsoft .NET Framework\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2026-23666 (GCVE-0-2026-23666)

Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-04-30 14:41

Title

.NET Framework Denial of Service Vulnerability

Summary

Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

CWE

CWE-755 - Improper Handling of Exceptional Conditions

Assigner

microsoft

References

URL

Tags

https://msrc.microsoft.com/update-guide/vulnerabi…

vendor-advisorypatch

Impacted products

Vendor

Product

Version

Microsoft

Microsoft .NET Framework 3.5

Affected: 3.5.0 , < 2.0.50727.8982 & 3.0.30729.8976 (custom)

Microsoft	Microsoft .NET Framework 3.5 AND 4.7.2	Affected: 4.7.0 , < 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.8	Affected: 4.8.0 , < 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0 (custom)
Microsoft	Microsoft .NET Framework 3.5 AND 4.8.1	Affected: 4.8.1 , < 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 (custom)
Microsoft	Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	Affected: 4.7.0 , < 4.8.4801.0 (custom)
Microsoft	Microsoft .NET Framework 4.8	Affected: 4.8.0 , < 4.8.4801.0 (custom)

Date Public ?

2026-04-14 14:00

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23666",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-15T13:40:59.739058Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-15T13:41:08.655Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          ]
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              "status": "affected",
              "version": "4.7.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
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            "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",
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            }
          ]
        },
        {
          "platforms": [
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            "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",
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          "product": "Microsoft .NET Framework 3.5 AND 4.8.1",
          "vendor": "Microsoft",
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      ],
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        "shortName": "microsoft"
      },
      "references": [
        {
          "name": ".NET Framework Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
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          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666"
        }
      ],
      "title": ".NET Framework Denial of Service Vulnerability"
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  },
  "cveMetadata": {
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    "datePublished": "2026-04-14T16:57:53.069Z",
    "dateReserved": "2026-01-14T16:59:33.464Z",
    "dateUpdated": "2026-04-30T14:41:48.509Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2026-18592

CVE-2026-23666 (GCVE-0-2026-23666)

Tags

Sightings

Nomenclature