Vulnerability

CVE-2026-56155

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 02:23

Description

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

STIX identifiervulnerability--7e655cc5-e5ef-5b1c-8a0f-b46a4713e5cb

First observation-

Last observation-

Known relationships19

Aliases and classifications

CWE-1220Insufficient Granularity of Access Control

Minimised technical details

No raw data

cvss score: 7.8
cvss vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
cvss severity: HIGH
cisa kev: True

Provenance

Public references

Active Directory Federation Services Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155

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.