CVE-2026-47640: 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 16.0.5556.1005Patch KB5002880 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20384Patch KB5002873 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20153Patch KB5002874
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47640?
CVE-2026-47640 has a medium severity rating of 5.4.
What systems are affected by CVE-2026-47640?
CVE-2026-47640 affects Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, Microsoft SharePoint Enterprise Server 2016, and Microsoft SharePoint Server 2019.
How do I fix CVE-2026-47640?
To fix CVE-2026-47640, apply the latest security updates provided by Microsoft for the affected SharePoint versions.
What type of vulnerability is CVE-2026-47640?
CVE-2026-47640 is classified as a spoofing vulnerability due to improper input neutralization during web page generation.
What is the attack vector for CVE-2026-47640?
CVE-2026-47640 can be exploited by an authorized attacker over a network to perform spoofing.