CVE-2026-56164

MEDIUM5.3

CISA KEV

Published 2026-07-14 · Updated 2026-07-14 · Source secure@microsoft.com

Description

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE-306

CISA Known-Exploited Vulnerability

Product: Microsoft — SharePoint Server

Name: Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability

Date added: 2026-07-14 · Due: 2026-07-17

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.

References

View on NVD

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