CVE-2026-21218
high
Microsoft CVSS v3 Base Score
7.5
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
EPSS Score
0.0%
Exploitation probability in 30 days
Top 91% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
High
Availability
None
Published: February 10, 2026 (93 days ago)
Last Modified: March 13, 2026
Vendor: Microsoft
Source: MITRE
Vulnerability Report
Generated by CyberWatcher
Description
Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
CWE
CWE-166Affected Products
Microsoft .NET 10.0Microsoft .NET 8.0Microsoft .NET 9.0