KB5104033: CVEs fixed (Windows update (KB))

KB5104033 fixes 1 tracked CVE. Affected systems and fixed versions.

CVE-2026-50649 HIGH 7.8 DOWNGRADE UPGRADE Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

Applies to

.NET 9.0 installed on Windows · fixed in 9.0.18

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