CVE-2026-23666

HIGH

.NET Framework Denial of Service Vulnerability

Title source: cna

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

CVSS v3 7.5

EPSS 0.0011

EPSS Percentile 28.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

CWE

CWE-755

Status published

Products (6)

Microsoft/Microsoft .NET Framework 3.5 3.5.0 - 2.0.50727.8982 & 3.0.30729.8976

Microsoft/Microsoft .NET Framework 3.5 AND 4.7.2 4.7.0 - 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0

Microsoft/Microsoft .NET Framework 3.5 AND 4.8 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 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 4.7.0 - 4.8.4801.0

Microsoft/Microsoft .NET Framework 4.8 4.8.0 - 4.8.4801.0

Published Apr 14, 2026

Tracked Since Apr 14, 2026