CVE-2026-64921
High
Description
Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Microsoft Sharepoint Server
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- microsoft sharepoint_server16.0.19725.20522 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft sharepoint_server | v < 16.0.19725.20522, 2016, 2019 | 16.0.19725.20522 |
Check your version
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