CVE-2026-21218
HIGH7.5EPSS 0.04%.NET Spoofing Vulnerability
Published: 2/10/2026Modified: 2/16/2026
Description
Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
Affected packages (3)
- Bitnami/dotnet>= 8.0.0, < 8.0.24, >= 9.0.0, < 9.0.13, >= 10.0.0, < 10.0.3
- Bitnami/dotnet-sdk>= 8.0.0, < 8.0.24, >= 9.0.0, < 9.0.13, >= 10.0.0, < 10.0.3
- NuGet/System.Security.Cryptography.Cose>= 8.0.0, < 8.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |