CVE-2026-65665: Microsoft SharePoint Server Remote Code Execution Vulnerability
Published Aug 11, 2026
·Updated
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
5 affected componentsFixes available
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition<16.0.19725.20522
16.0.19725.20522
Microsoft SharePoint Server 2019<16.0.10417.20198
16.0.10417.20198
Microsoft SharePoint Server<16.0.19725.20522
Microsoft SharePoint Server=2019
Remediation
Event History
Aug 11, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:04 PM
Data Sourced
via MITRE·05:04 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-65665?
CVE-2026-65665 has a high severity rating of 8.8.
2
How do I fix CVE-2026-65665?
To fix CVE-2026-65665, ensure that you apply the latest security updates provided by Microsoft.
3
What systems are affected by CVE-2026-65665?
CVE-2026-65665 affects Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Server 2019.
4
What type of vulnerability is CVE-2026-65665?
CVE-2026-65665 is a remote code execution vulnerability caused by the deserialization of untrusted data.
5
Who can exploit CVE-2026-65665?
An authorized attacker with network access can exploit CVE-2026-65665 to execute code remotely.