Executive summary
Public evidence documents CVE-2026-45659. This report does not assess any organization.
Technical analysis
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
Evidence and sources
Public evidence for CVE-2026-45659 with preserved provenance.
CVE-2026-45659 Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
IOCs
No public IOC is available.
CVEs and affected products
Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability
ATT&CK mapping
No ATT&CK mapping is available.
Detection content
Sigma rules, YARA rules, Splunk SPL, and KQL detection logic.
Threat hunting
Hypothesis-driven hunt procedures and telemetry checklist.
Remediation
Containment actions, patching notes, and credential steps.
Historical relationships
No published historical relationship is available.
Timeline and change history
Confidence and caveats
1.0
⚠️ Public CTI only; no organizational exposure is asserted.
⚠️ CVSS and EPSS metadata were not present in the retrieved evidence payload.