CVE-2026-47639: 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
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.
— NVD
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 16.0.19725.20384Patch KB5002873 - 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 16.0.10417.20153Patch KB5002874
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47639?
The severity of CVE-2026-47639 is rated as medium with a score of 5.4.
How do I fix CVE-2026-47639?
To mitigate CVE-2026-47639, ensure all Microsoft SharePoint Server software is updated to the latest security patches provided by Microsoft.
What systems are affected by CVE-2026-47639?
CVE-2026-47639 affects Microsoft SharePoint Server, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Server 2019.
What is the nature of CVE-2026-47639?
CVE-2026-47639 is a spoofing vulnerability that arises from improper input neutralization during web page generation, leading to potential cross-site scripting (XSS) attacks.
Can an attacker exploit CVE-2026-47639 remotely?
Yes, an authorized attacker can exploit CVE-2026-47639 remotely over a network to perform spoofing.