CVE-2026-40365: Microsoft SharePoint Server Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Other sources
Microsoft SharePoint Server Remote Code Execution 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 16.0.5552.1002Patch KB5002868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20280Patch KB5002863 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20128Patch KB5002870
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40365?
CVE-2026-40365 is rated as critical due to its potential to allow remote code execution.
How do I fix CVE-2026-40365?
To address CVE-2026-40365, apply the latest security updates released by Microsoft for your specific SharePoint Server version.
What are the affected versions for CVE-2026-40365?
CVE-2026-40365 affects Microsoft SharePoint Server Subscription Edition, SharePoint Enterprise Server 2016, and SharePoint Server 2019.
Who is impacted by CVE-2026-40365?
Organizations using vulnerable versions of Microsoft SharePoint Server may be at risk of exploitation through CVE-2026-40365.
What kind of attack does CVE-2026-40365 enable?
CVE-2026-40365 allows an authorized attacker to execute arbitrary code over a network.