CWE-166: CWE-166

Total CVEs

Critical

High

7.5

Avg CVSS

Yearly Trend

2026

Top Affected Vendors

1 Microsoft 1

All CWE-166 CVEs (1)

CVE-2026-21218

7.5

This .NET vulnerability allows unauthorized attackers to perform spoofing attacks over a network by exploiting improper handling of missing special el...

Feb 10, 2026

About CWE-166 (CWE-166)

Our database tracks 1 CVEs classified as CWE-166, with 0 rated critical and 1 rated high severity. The average CVSS score for CWE-166 vulnerabilities is 7.5.

External reference: View CWE-166 on MITRE CWE →

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