CVE-2025-21396

HIGH
2025-01-29 [email protected]
8.2
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 18:06 vuln.today
CVE Published
Jan 29, 2025 - 23:15 nvd
HIGH 8.2

Tags

Microsoft Authentication Bypass Account

Description

Missing authorization in Microsoft Account allows an unauthorized attacker to elevate privileges over a network.

Analysis

Missing authorization in Microsoft Account allows an unauthorized attacker to elevate privileges over a network. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. Missing authorization in Microsoft Account allows an unauthorized attacker to elevate privileges over a network. Affected products include: Microsoft Account.

Affected Products

Microsoft Account.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.

Priority Score

43
Low Medium High Critical
KEV: 0
EPSS: +2.0
CVSS: +41
POC: 0

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CVE-2025-21396 vulnerability details – vuln.today
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