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KB5099415: what it fixes and who gets it

KB5099415 is a ie cumulative from Microsoft's July 2026 release for Windows Server 2012, Windows Server 2012 R2.

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 KB5099415

CVETypeCVSSSeverity
CVE-2026-50480Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege VulnerabilityElevation of Privilege7.8Important

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