Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability
Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.
Official details
- Category
- Known exploited vulnerability
- Classification
- Ransomware use: Unknown
- Company or vendor
- Microsoft SharePoint Server
- Affected product
- SharePoint Server
- Risk or reason
- Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.
- Remedy or 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 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.
- Official ID
- CVE-2026-56164