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KB5099414: what it fixes and who gets it

KB5099414 is a security update from Microsoft's October 2026 release for Windows 11 Version 23H2.

Microsoft data read
1CVEs fixed
0rated Critical
0already exploited
Yesrestart 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 KB5099414

CVETypeCVSSSeverity
CVE-2026-59116Windows Remote Desktop Security Feature Bypass VulnerabilitySecurity Feature Bypass6.8Important

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