CVE-2026-45464: 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-2026-45464?
The severity of CVE-2026-45464 is medium, rated at 5.4.
How do I fix CVE-2026-45464?
To mitigate CVE-2026-45464, ensure that you apply the latest security updates provided by Microsoft for SharePoint Server.
What type of vulnerability is CVE-2026-45464?
CVE-2026-45464 is classified as a spoofing vulnerability due to improper input neutralization during web page generation.
Who is affected by CVE-2026-45464?
CVE-2026-45464 affects users of Microsoft SharePoint Server, including versions 2016, 2019, and the Subscription Edition.
What can an attacker do with CVE-2026-45464?
An authorized attacker exploiting CVE-2026-45464 can perform spoofing attacks over a network.