What is CVE-2026-70332?

CVE-2026-70332 is a critical-severity vulnerability in Microsoft Sharepoint Online, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-08-07.

How severe is CVE-2026-70332?

Critical severity. CVSS v3 base score is 9.6 out of 10.

XSS in Microsoft Sharepoint Online

CVE-2026-70332

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

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Microsoft Sharepoint Online
Microsoft Sharepoint_online

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-70332?: CVE-2026-70332 is a critical-severity vulnerability in Microsoft Sharepoint Online, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-08-07.
How severe is CVE-2026-70332?: Critical severity. CVSS v3 base score is 9.6 out of 10.