MicrosoftCVE-2026-64901
Microsoft Office SharePoint: unsafe deserialization
High8.8CVE-2026-64901 · Published Aug 11, 2026 · updated Aug 12, 2026
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 Product | >= 16.0.0, < 16.0.5565.1001 | 16.0.5565.1001 |
| Microsoft SharePoint Server 2019 Product | >= 16.0.0, < 16.0.10417.20198 | 16.0.10417.20198 |
| Microsoft SharePoint Server Subscription Edition Product | >= 16.0.0, < 16.0.19725.20522 | 16.0.19725.20522 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-502
More Microsoft advisories
All Microsoft| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 11 | Copilot Chat Security Feature Bypass Vulnerability | High7.1 | 1.132.1 |
| Aug 11 | Copilot Custom Agent Hook Remote Code Execution Vulnerability | High7.8 | 1.132.1 |
| Aug 11 | Information disclosure vulnerability | Medium | 1.132.1 |
| Aug 11 | Fileless RCE in VS Code Web Remote Terminal via URL-Controlled NODE_OPTIONS | High8.8 | 1.132.1 |
| Aug 11 | Visual Studio Code web deployments - environmentService.ts - RCE via NODE_OPTIONS --import from URL payload | High8.8 | 1.132.1 |
| Aug 11 | TerminalInstance._createProcess - Workspace Trust bypass via terminal waitOnExit | High7.8 | 1.132.1 |