KB5002903: what it fixes and who gets it
KB5002903 is a security update from Microsoft's August 2026 release for Microsoft Excel 2016 (32-bit edition), Microsoft Excel 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 KB5002903
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-68794Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Critical |
| CVE-2026-68804Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Critical |
| CVE-2026-68816Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Critical |
| CVE-2026-65807Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-68793Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68795Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68796Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68800Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68801Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68803Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68805Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68806Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68807Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68810Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68811Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68812Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68814Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68815Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-68817Microsoft Excel Remote Code Execution Vulnerability | Remote Code Execution | 7.8 | Important |
| CVE-2026-70327Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-70328Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-68797Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-68799Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-68802Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
| CVE-2026-68808Microsoft Excel Information Disclosure Vulnerability | Information Disclosure | 5.5 | Important |
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