KB5002901: what it fixes and who gets it
KB5002901 is a security update from Microsoft's August 2026 release for Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition).
Microsoft data read
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 KB5002901
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-63525Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Critical |
| CVE-2026-64907Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Critical |
| CVE-2026-63527Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-64905Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-64915Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-70311Microsoft Office Word Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-70105Microsoft Word Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-63521Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-63528Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-63530Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-63531Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-64917Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-66806Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-66809Microsoft Office Graphics Component Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-66810Microsoft Office Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-70310Microsoft Word Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-70318Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
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