CVE-2026-33110: 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 16.0.10417.20128Patch KB5002870 - 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 16.0.5552.1002Patch KB5002868
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33110?
CVE-2026-33110 is a critical severity vulnerability that allows unauthorized remote code execution in Microsoft SharePoint Server.
How do I fix CVE-2026-33110?
To fix CVE-2026-33110, apply the latest security patches provided by Microsoft for the affected SharePoint versions.
Which versions of Microsoft SharePoint are affected by CVE-2026-33110?
CVE-2026-33110 affects Microsoft SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition.
What type of vulnerability is CVE-2026-33110?
CVE-2026-33110 is a remote code execution vulnerability caused by the deserialization of untrusted data.
Can an attacker exploit CVE-2026-33110 remotely?
Yes, an authorized attacker can remotely exploit CVE-2026-33110 to execute code over a network.