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KB5122874: what it fixes and who gets it

KB5122874 is a servicing stack update from Microsoft's September 2026 release for Windows 10 Version 1607.

Microsoft data read
1CVEs 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 KB5122874

CVETypeCVSSSeverity
CVE-2026-81955Windows Graphics Component Remote Code Execution VulnerabilityRemote Code Execution8.8Critical

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