Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-88163

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
13 October 2026

What is CVE-2026-88163?

An integer overflow vulnerability in Microsoft Office SharePoint could be exploited by an authorized attacker to execute arbitrary code over a network. This serious flaw may allow attackers to bypass security features and gain unauthorized access to sensitive functions. Users should apply the necessary patches as advised to mitigate risks associated with this vulnerability.

Affected Version(s)

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.20326.20190

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.