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KB5002898: what it fixes and who gets it

KB5002898 is a security update from Microsoft's September 2026 release for Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition).

Microsoft data read
2CVEs 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 KB5002898

CVETypeCVSSSeverity
CVE-2026-78526Microsoft Office Word Remote Code Execution VulnerabilityRemote Code Execution8.8Important
CVE-2026-80084Microsoft Office Outlook Information Disclosure VulnerabilityInformation Disclosure6.5Important

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