CISA KEV: CVE-2026-45659 — Microsoft SharePoint Server actively exploited

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. Required action: 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 applicabl