CVE-2026-55016: 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
Event History
Frequently Asked Questions
What is the severity of CVE-2026-55016?
CVE-2026-55016 has a medium severity rating of 5.4.
How do I fix CVE-2026-55016?
To fix CVE-2026-55016, apply the available patch provided by Microsoft.
What systems are affected by CVE-2026-55016?
CVE-2026-55016 affects Microsoft SharePoint Server, SharePoint Server Subscription Edition, SharePoint Enterprise Server 2016, and SharePoint Server 2019.
What type of vulnerability is CVE-2026-55016?
CVE-2026-55016 is classified as a spoofing vulnerability due to improper neutralization of input leading to cross-site scripting.
What are the potential impacts of CVE-2026-55016?
If exploited, CVE-2026-55016 can allow an authorized attacker to perform spoofing attacks over a network.