May 2026: Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2026-45659 Published on May 22, 2026
Microsoft SharePoint Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-45659 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-45659
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Affected Versions
Microsoft SharePoint Enterprise Server 2016:- Version 16.0.0 and below 16.0.5552.1002 is affected.
- Version 16.0.0 and below 16.0.10417.20128 is affected.
- Version 16.0.0 and below 16.0.19725.20280 is affected.