UpHeron
All vulnerabilities

Servers and applications

CVE-2026-21218

Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.

Severity
High 7.5
Published
10 Feb 2026
Last changed
17 Jun 2026
Added to UpHeron
22 Oct 2026
Fixed in
8.0.24, 9.0.13, 10.0.3
Sources
NVD

Affected software

SoftwareAffected versions
.NETServers and applications · cpe:a:microsoft:.net
  • From 8.0.0 before 8.0.24
  • From 9.0.0 before 9.0.13
  • From 10.0.0 before 10.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-21218
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-21218