CVE-2026-56164
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Microsoft·SharePoint Server
- Added
- Jul 14, 2026
- Fix due
- Jul 17, 2026
- Ransomware
- Not known
- Published
- Jul 14, 2026
- Updated
- Nov 1, 2026
- First covered
- Jul 14, 2026
- Latest story
- 1 month ago
Summary
Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
CWE-306Missing Authentication for Critical Function
Attack profile
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:CCISA 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 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 products
- Microsoft SharePoint Enterprise Server 201616.0.0 to before 16.0.5561.1001
- Microsoft SharePoint Server 201916.0.0 to before 16.0.10417.20175
- Microsoft SharePoint Server Subscription Edition16.0.0 to before 16.0.19725.20434