CVE-2026-45659
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
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Microsoft SharePoint Server permite la ejecución remota de código (RCE) debido a una vulnerabilidad de deserialización de datos no confiables. Este fallo está siendo explotado activamente y permite que un atacante con acceso a la red tome el control del servidor. Es fundamental actualizar las instancias afectadas de inmediato para proteger la infraestructura empresarial.
Relevant roles
Severity
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCWE-502CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Affects
microsoft:sharepoint_serverTechnical description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.