Cross-Site Scripting Vulnerability in Microsoft Office SharePoint
CVE-2026-69402

7.3HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
8 September 2026

What is CVE-2026-69402?

A vulnerability exists in Microsoft Office SharePoint that allows for improper neutralization of input during web page generation. This flaw facilitates cross-site scripting (XSS), enabling authorized attackers to execute spoofing attacks within a network. By taking advantage of this vulnerability, attackers may impersonate other users or redirect them to malicious sites, leading to potential data breaches and compromise of sensitive information. Users of affected versions are urged to apply patches and adopt security measures to mitigate the associated risks.

Affected Version(s)

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.20326.20090

References

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

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.