Vulnerability-Lookup

MSRC_CVE-2026-23666

Vulnerability from csaf_microsoft - Published: 2026-04-14 07:00 - Updated: 2026-04-15 07:00

Summary

.NET Framework Denial of Service Vulnerability

Severity

Critical

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Customer Action: Required. The vulnerability documented by this CVE requires customer action to resolve.

CVE-2026-23666

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-755 - Improper Handling of Exceptional Conditions

Affected products

Fixed 49 products

Known affected 49 products

Threats

Impact Denial of Service

Exploit Status Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely

References

7 references

URL	Category
https://msrc.microsoft.com/update-guide/vulnerabi…	self
https://msrc.microsoft.com/csaf/advisories/2026/m…	self
https://www.microsoft.com/en-us/msrc/exploitabili…	external
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/update-guide/vulnerabi…	self
https://msrc.microsoft.com/csaf/advisories/2026/m…	self

Acknowledgments

Anonymous

JSON

To clipboard

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            "confidentialityImpact": "NONE",
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            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
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          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
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      ],
      "title": ".NET Framework Denial of Service Vulnerability"
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  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-05-12 17:38

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

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

6 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

To clipboard

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          "lang": "en-US",
          "value": "Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "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",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755: Improper Handling of Exceptional Conditions",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-12T17:38:49.160Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": ".NET Framework Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666"
        }
      ],
      "title": ".NET Framework Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-23666",
    "datePublished": "2026-04-14T16:57:53.069Z",
    "dateReserved": "2026-01-14T16:59:33.464Z",
    "dateUpdated": "2026-05-12T17:38:49.160Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Product	Identifier	Version	Remediation
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 4.8 4.8.4801.0 Microsoft .NET Framework 4.8		4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8		2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2		2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0
Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2		2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0
Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2		2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2		4.8.4801.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2		4.8.4801.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2		4.8.4801.0
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2		4.8.4801.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1		2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0
Microsoft .NET Framework 3.5 2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5		2.0.50727.8982 & 3.0.30729.8976
Microsoft .NET Framework 3.5 2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5		2.0.50727.8982 & 3.0.30729.8976
Microsoft .NET Framework 3.5 2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5		2.0.50727.8982 & 3.0.30729.8976
Microsoft .NET Framework 3.5 2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5		2.0.50727.8982 & 3.0.30729.8976

Product	Version	Remediation
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8.1 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 Microsoft .NET Framework 3.5 AND 4.8.1	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0	Vendor Fix fix
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 <4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 <4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 <4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 <4.8.4801.0 Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.7.2 <2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2	<2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.7.2 <2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2	<2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.7.2 <2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 Microsoft .NET Framework 3.5 AND 4.7.2	<2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 AND 4.8 <2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 Microsoft .NET Framework 3.5 AND 4.8	<2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 4.8 <4.8.4801.0 Microsoft .NET Framework 4.8	<4.8.4801.0	Vendor Fix fix
Microsoft .NET Framework 3.5 <2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5	<2.0.50727.8982 & 3.0.30729.8976	Vendor Fix fix
Microsoft .NET Framework 3.5 <2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5	<2.0.50727.8982 & 3.0.30729.8976	Vendor Fix fix
Microsoft .NET Framework 3.5 <2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5	<2.0.50727.8982 & 3.0.30729.8976	Vendor Fix fix
Microsoft .NET Framework 3.5 <2.0.50727.8982 & 3.0.30729.8976 Microsoft .NET Framework 3.5	<2.0.50727.8982 & 3.0.30729.8976	Vendor Fix fix

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MSRC_CVE-2026-23666

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

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Nomenclature