What is CVE-2026-69402?

CVE-2026-69402 is a high-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-09-08.

How severe is CVE-2026-69402?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in Microsoft Sharepoint Server Subscription Edition

CVE-2026-69402

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

Affected products

Microsoft Sharepoint Server Subscription Edition

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-69402?: CVE-2026-69402 is a high-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-09-08.
How severe is CVE-2026-69402?: High severity. CVSS v3 base score is 7.3 out of 10.