CVE-2026-58644
🔥 Known Exploited (CISA KEV)CRITICAL
9.2
CVSS Severity Score
Vulnerability Description
Microsoft SharePoint is vulnerable to Microsoft SharePoint Deserialization of Untrusted Data Vulnerability. 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.
Affected Platforms (CPE)
No CPE configurations currently published for this record.