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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 13, 2026 · NIST NVD

   Detected

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

2. Oct 14, 2026 · NIST NVD

   Updated

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

Affected

• cpe microsoft/sharepoint serverversion unspecified
• microsoft Microsoft SharePoint Server Subscription Editionversion unspecified
• vendor Microsoft Microsoft SharePoint Server Subscription Editionversion unspecified

Sources

• CIRCL Vulnerability LookupVulnerability recordCVE-2026-85900

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

  vulnerability.circl.lu
• CVE.orgVulnerability recordCVE-2026-85900

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-85900

  30-day exploitation probability 1.5%

  first.org
• Microsoft Security Update GuideVendor advisoryCVE-2026-85900

  Microsoft SharePoint Server Subscription Edition

  msrc.microsoft.com
• NIST NVDVulnerability recordCVE-2026-85900

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

  nvd.nist.gov

References

• Patch · msrc.microsoft.com