CVE-2026-85900
Microsoft Office SharePoint Remote Code Execution Vulnerability
Microsoft Microsoft SharePoint Server Subscription EditionApplications & CMS
CVSS
8.8HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)1.52%Chance of exploitation activity in the next 30 days, higher than 74% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 16.0.20326.20190Microsoft SharePoint Server Subscription EditionCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Text from CVE List
Affected versions 1
- Microsoft SharePoint Server Subscription Editionaffected: 16.0.0 before 16.0.20326.20190CVE List