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High severity8.0NVD Advisory· Published May 12, 2026· Updated Jun 17, 2026

CVE-2026-40368

CVE-2026-40368

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected products

4

Microsoft/Sharepoint Server3 versions
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*+ 2 more
- cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*range: <16.0.19725.20280
- cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
- cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
Microsoft/Office SharePointllm-fuzzy

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40368nvdVendor Advisory

News mentions

1

Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-days
BleepingComputer · May 12, 2026