Vulnerability

CVE-2026-56164

Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.

Sharing: TLP:CLEAR
Confidence: 100
Source: Cybersecurity and Infrastructure Security Agency
Updated: 26/09/2026 05:09

Description

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

STIX identifiervulnerability--9d9d813f-d9dd-55f9-9392-47517a853a4f

First observation-

Last observation-

Known relationships9

Aliases and classifications

CWE-306Missing Authentication for Critical Function

Minimised technical details

No raw data

cvss score: 5.3
cvss vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C
cvss severity: MEDIUM
cisa kev: True

Provenance

Public references

Microsoft SharePoint Server Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164

EudorIA correlation

Intel catalogue

The vulnerability is also available in the EudorIA editorial catalogue.

Open EudorIA analysis

Presence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.