CVE-2026-55034

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.

Score

CVSS 3.1 8.7 High

Status

Analyzed - secure@microsoft.com

Published

2026-07-14

Last modified

2026-10-28

Weaknesses

CWE-79

Affected products

• Sharepoint Server (Microsoft)
• Sharepoint Server 2016 (Microsoft)
• Sharepoint Server 2019 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55034