CVE-2026-65658: 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 16.0.10417.20198Patch KB5002896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1001Patch KB5002906 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20522Patch KB5002893
Event History
Frequently Asked Questions
What is the severity of CVE-2026-65658?
CVE-2026-65658 has a severity rating of high at 8.8.
How do I fix CVE-2026-65658?
To mitigate CVE-2026-65658, ensure your Microsoft SharePoint Server is updated to the latest security patches released by Microsoft.
What systems are affected by CVE-2026-65658?
CVE-2026-65658 affects Microsoft SharePoint Server, including versions 2019, Subscription Edition, and Enterprise Server 2016.
What type of vulnerability is CVE-2026-65658?
CVE-2026-65658 is a Remote Code Execution vulnerability caused by the deserialization of untrusted data.
Who is at risk from CVE-2026-65658?
Authorized attackers with network access to Microsoft SharePoint can exploit CVE-2026-65658 to execute code.