KB5002893: what it fixes and who gets it
KB5002893 is a security update from Microsoft's August 2026 release for Microsoft SharePoint Server Subscription 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 KB5002893
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-62827Microsoft SharePoint Server Elevation of Privilege Vulnerability | Elevation of Privilege | 8.8 | Critical |
| CVE-2026-64921Microsoft SharePoint Server Elevation of Privilege Vulnerability | Elevation of Privilege | 8.8 | Critical |
| CVE-2026-65665Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Critical |
| CVE-2026-70306Microsoft Office SharePoint Spoofing Vulnerability | Spoofing | 9.3 | Important |
| CVE-2026-63514Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-64901Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-65658Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-65660Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-65663Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-66805Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-66808Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-70321Microsoft SharePoint Remote Code Execution Vulnerability | Remote Code Execution | 8.8 | Important |
| CVE-2026-70324Microsoft SharePoint Elevation of Privilege Vulnerability | Elevation of Privilege | 8.8 | Important |
| CVE-2026-70326Microsoft SharePoint Server Elevation of Privilege Vulnerability | Elevation of Privilege | 8.8 | Important |
| CVE-2026-63520Microsoft SharePoint Server Remote Code Execution Vulnerability | Remote Code Execution | 8.1 | Important |
| CVE-2026-57105Microsoft Office SharePoint Spoofing Vulnerability | Spoofing | 8.0 | Important |
| CVE-2026-64900Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 7.3 | Important |
| CVE-2026-70355Microsoft SharePoint Server Elevation of Privilege Vulnerability | Elevation of Privilege | 7.3 | Important |
| CVE-2026-58639Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 6.5 | Important |
| CVE-2026-62837Microsoft SharePoint Server Information Disclosure Vulnerability | Information Disclosure | 6.5 | Important |
| CVE-2026-62839Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 6.5 | Important |
| CVE-2026-63512Microsoft SharePoint Server Tampering Vulnerability | Tampering | 6.5 | Important |
| CVE-2026-63516Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 6.5 | Important |
| CVE-2026-62829Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
| CVE-2026-62917Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
| CVE-2026-64897Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
| CVE-2026-64902Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
| CVE-2026-64916Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
| CVE-2026-64922Microsoft SharePoint Server Spoofing Vulnerability | Spoofing | 4.6 | Important |
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