CVE-2026-403658.8HighCWE-1220

CVE-2026-40365: Microsoft SharePoint Server Remote Code Execution Vulnerability

Microsoft · Microsoft SharePoint Enterprise Server 2016

Vendor fix available · Affected: Microsoft SharePoint Enterprise Server 2016 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.0%probability of exploitation in the next 30 days

62nd percentile

050100

Higher than 62% of scored CVEs

8.8HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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

Affected products3

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Microsoft · Microsoft SharePoint Enterprise Server 2016from 16.0.0 before 16.0.5552.1002
Microsoft · Microsoft SharePoint Server 2019from 16.0.0 before 16.0.10417.20128
Microsoft · Microsoft SharePoint Server Subscription Editionfrom 16.0.0 before 16.0.19725.20280

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Insufficient Granularity of Access Control · Access Control
Vendor: Microsoft
Published: May 2026
Band: Unlikely (under 1%), May 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-40365 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.