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KB5094041: what it fixes and who gets it

KB5094041 is a monthly rollup from Microsoft's July 2026 release for Windows Server 2012 R2.

Microsoft data read
2CVEs fixed
1rated Critical
0already exploited
Yesrestart required

Should you install it?

Yes. It closes holes Microsoft rates Critical, the most serious rating it uses. 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 KB5094041

CVETypeCVSSSeverity
CVE-2026-48564DHCP Server Service Remote Code Execution VulnerabilityRemote Code Execution8.8Critical
CVE-2026-42990SQL Server ODBC driver Elevation of Privilege VulnerabilityRemote Code Execution9.8Important

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