CVE-2026-23666
.NET Framework Denial of Service Vulnerability
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
| Vendor | microsoft |
| Product | microsoft .net framework 3.5 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Apr 14, 2026 |
| Last Updated | Apr 16, 2026 |
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CVSS v3 Breakdown
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
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
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