CVE-2026-64900: Microsoft SharePoint Server Spoofing Vulnerability
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.
Other sources
Microsoft SharePoint Server Spoofing Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20522Patch KB5002893 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20198Patch KB5002896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1001Patch KB5002906
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64900?
The severity of CVE-2026-64900 is high, with a CVSS score of 7.3.
How does CVE-2026-64900 affect Microsoft SharePoint?
CVE-2026-64900 allows an authorized attacker to perform spoofing on Microsoft SharePoint servers due to improper input neutralization.
What versions of Microsoft SharePoint are impacted by CVE-2026-64900?
CVE-2026-64900 affects Microsoft SharePoint Server Subscription Edition, Microsoft SharePoint Server 2019, and Microsoft SharePoint Enterprise Server 2016.
How do I fix CVE-2026-64900?
To fix CVE-2026-64900, apply the necessary security updates provided by Microsoft for the affected SharePoint versions.
What type of vulnerability is CVE-2026-64900?
CVE-2026-64900 is classified as a spoofing vulnerability caused by cross-site scripting in Microsoft SharePoint.