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Microsoft security update KB5081278, which patches critical vulnerabilities in .NET 9.0.

KB5081278 Updates .NET 9.0 to 9.0.14 With Two Security Fixes

Microsoft released KB5081278 on March 10, 2026 for .NET 9.0.14. The release notes list CVE-2026-26127 and CVE-2026-26130, replacing the three unrelated CVEs previously cited here.

Mar 11, 20261 min readEmanuel De Almeida