Product:
Microsoft Office SharePoint
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network. This vulnerability can lead to significant impacts on confidentiality, integrity, and availability. Attackers can exploit this flaw to gain unauthorized access and execute malicious code.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 8.8 | CVE-2026-20963 |
Exploitation
To exploit this vulnerability, an attacker must have authorized access to the affected Microsoft Office SharePoint environment. By sending specially crafted data to the application, the attacker can trigger the deserialization process, allowing them to execute arbitrary code on the server. This can lead to full control over the affected system and potential data breaches.
Affected Products
- Microsoft Office SharePoint: A web-based collaboration platform that integrates with Microsoft Office, allowing users to create, manage, and share content.
Mitigation
To mitigate this vulnerability, it is recommended to apply the latest security updates provided by Microsoft. Additionally, organizations should review their access controls and ensure that only authorized users have access to sensitive systems. Regular security assessments and monitoring can also help detect and prevent potential exploitation.