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CVE-2026-23666

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CVE-2026-23666

Published: Apr 14, 2026

Modified: Jun 1, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

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

VendorProductVersions

Microsoft

Microsoft .NET Framework 3.5

affected
3.5.0 - < 2.0.50727.8982 & 3.0.30729.8976

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

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

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

Microsoft

Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2

affected
4.7.0 - < 4.8.4801.0

Microsoft

Microsoft .NET Framework 4.8

affected
4.8.0 - < 4.8.4801.0

Weaknesses (CWE)

CWE-755

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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