CVE-2026-21218
.NET Spoofing Vulnerability
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
13th
Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
| Vendor | microsoft |
| Product | .net 10.0 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Feb 10, 2026 |
| Last Updated | Apr 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / .NET 10.0
10.0.0 < 10.0.3
Microsoft / .NET 8.0
8.0.0 < 8.0.24
Microsoft / .NET 9.0
9.0.0 < 9.0.13