microsoftentra-idcve-2026-69836

Microsoft Entra ID Flaw (CVE-2026-69836) Exploited in the Wild – Critical Remote Code Execution

A CVSS 10.0 vulnerability (CVE-2026-69836) in Microsoft Entra ID was actively exploited before Microsoft patched it. The flaw allowed unauthenticated remote code execution. Microsoft has mitigated the issue, but the attack window remains a concern.

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What is the vulnerability?

Microsoft disclosed a maximum‑severity deserialization flaw in its cloud identity service Entra ID (formerly Azure AD) tracked as CVE-2026-69836. The vulnerability scores a CVSS 10.0 and allows an unauthenticated attacker to execute arbitrary code on the service[1].

How was it exploited?

Microsoft confirmed the flaw was already being exploited in the wild before the patch was released. While details of the attack chain are scarce, the advisory notes that the bug enables remote code execution without any user interaction or privileges[2] The Hacker News.

Impact and scope

Entra ID underpins identity and access management for millions of Microsoft customers, protecting access to Azure services, Office 365, and countless third‑party applications. Successful exploitation could let attackers impersonate any identity, compromise data, and disrupt services across the Microsoft cloud ecosystem[3] The Register.

Mitigation and response

Microsoft states the vulnerability has been fully mitigated on its side, requiring no action from customers. The company credits principal security engineer Robert Fitzpatrick for discovering and reporting the issue. Administrators should monitor Microsoft’s security advisories for any follow‑up guidance and ensure Entra ID configurations follow the principle of least privilege.