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KB5097148: what it fixes and who gets it

KB5097148 is a security update from Microsoft's June 2026 release for .NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Windows and other products.

Microsoft data read
3CVEs fixed
0rated Critical
0already exploited
Norestart required

Should you install it?

Yes. It is a routine security update; none of its fixes are rated Critical or reported as exploited. Windows Update installs it automatically on supported home PCs.

If the installation fails or the PC misbehaves afterwards, note the exact error code first: the fix depends on it. Our update troubleshooting guides are linked on this page.

Security fixes in KB5097148

CVETypeCVSSSeverity
CVE-2026-45490.NET SDK Elevation of Privilege VulnerabilityElevation of Privilege7.8Important
CVE-2026-45591ASP.NET Core Denial of Service VulnerabilityDenial of Service7.5Important
CVE-2026-45491.NET Tampering VulnerabilityTampering6.2Important

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