# CVE-2026-63514: Microsoft Office SharePoint deserialization code execution

Source: https://junglewise.ai/threats/cve-2026-63514-microsoft-office-sharepoint-deserialization-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-63514 · Severity: high · CVSS 8.8 · Published 2026-08-11

Microsoft Office SharePoint is a widely-used enterprise collaboration and document management platform. A deserialization vulnerability allows an authorized attacker to execute arbitrary code on the server, potentially leading to unauthorized access to sensitive business data, disruption of services, or lateral movement within corporate networks.

Technologies: [Microsoft Office SharePoint](https://junglewise.ai/threats/technologies/office-sharepoint). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-63514 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-63514 being exploited in the wild.

**How severe is CVE-2026-63514?** High severity, with a CVSS score of 8.8, published 11 August 2026.

**Which products and versions are affected?** Microsoft Office SharePoint <UNKNOWN>.

**Is there a fix for CVE-2026-63514?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-63514 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-63514?** Check whether you run Microsoft Office SharePoint at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a deserialization of untrusted data flaw in Microsoft Office SharePoint that allows authenticated attackers to achieve remote code execution. The attack requires network access and valid authorization credentials to the SharePoint instance. An attacker can craft malicious serialized objects that, when deserialized by the application, trigger arbitrary code execution with the privileges of the SharePoint service account. Patches addressing this vulnerability are available from Microsoft.

## Affected products

- Microsoft Office SharePoint <UNKNOWN>

## Timeline

- 2026-08-11: disclosed
- 2026-08-11: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63514](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63514)

## Related threats

- [Microsoft Office SharePoint privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-88176-missing-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint XSS privilege escalation](https://junglewise.ai/threats/cve-2026-80095-improper-neutralization-of-input-during-web-page-generation-cross)
- [Microsoft Office SharePoint server-side request forgery](https://junglewise.ai/threats/cve-2026-124210-server-side-request-forgery-ssrf-in-microsoft-office-sharepoint)
- [Microsoft Office SharePoint privilege escalation via incorrect authorization](https://junglewise.ai/threats/cve-2026-123391-incorrect-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-123390-deserialization-of-untrusted-data-in-microsoft-office-sharepoint)