Elevation of Privilege Vulnerability in Microsoft Account by Microsoft
CVE-2025-21396
Summary
An elevation of privilege vulnerability exists in Microsoft Account due to missing authorization checks. This flaw enables an unauthorized attacker to exploit this weakness over a network, potentially leading to unauthorized access and control over user accounts.
Affected Version(s)
Microsoft Account Unknown
News Articles
Microsoft fixes CVSS 9.9 vulnerability in Azure AI Face service
The flaw enabled authentication bypass by spoofing, with a proof-of-concept exploit available.

Critical New Microsoft Account Takeover Bypassed Authentication
Microsoft has confirmed that Microsoft Accounts have been left with missing authentication mechanisms that could lead to a hacker takeover. Here’s what you need to know.
Microsoft Patches Critical Azure AI Face Service Vulnerability with CVSS 9.9 Score
Microsoft fixes CVE-2025-21415 (CVSS 9.9) and CVE-2025-21396 flaws, addressing privilege escalation risks in Azure AI Face Service and Microsoft Accou
References
CVSS V3.1
Timeline
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First article discovered by The Hacker News
Vulnerability published