Hackers Can Abuse Entra Agent ID Administrator Role to Hijack Service Principals

Cybersecuritynews •Abinaya • April 25, 2026

A critical scope overreach vulnerability was recently identified in the Microsoft Entra Agent Identity Platform. The newly introduced Agent ID Administrator role allowed accounts to hijack arbitrary service principals and escalate privileges across the entire tenant. Microsoft has fully patched this behavior across all cloud environments as of April 2026. How the Permission Boundary Breaks […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Vulnerability in Microsoft Entra ID Allows Service Principal Hijacking A critical scoping vulnerability was identified in Microsoft Entra ID's Agent Identity Platform, enabling users with the Agent ID Administrator role to hijack arbitrary service principals within an organization's tenant. This flaw poses a significant risk of privilege escalation, potentially compromising sensitive data and administrative controls. Microsoft has confirmed that the vulnerability has been fully patched across all cloud environments as of April 2026. The issue arises from a breakdown in the permission boundary intended to restrict the role's capabilities. Organizations utilizing Microsoft Entra ID should verify that they have applied the latest updates to mitigate this risk. The vulnerability affects all tenants using the Agent ID Administrator role. No specific CVEs were mentioned in the articles, but the severity of the flaw necessitates immediate attention from security teams. 8 sources 72

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Hackers Can Abuse Entra Agent ID Administrator Role to Hijack Service Principals

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Extracted Entities

CWE Weaknesses (1)

MITRE ATT&CK (1)

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