What is CVE-2025-21396?

CVE-2025-21396 is a high-severity vulnerability in Microsoft Account, classified under Missing Authorization. CVSS score: 8.2/10. Published 2025-01-29.

How severe is CVE-2025-21396?

High severity. CVSS v3 base score is 8.2 out of 10.

Auth bypass in Microsoft Account

CVE-2025-21396

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

Vulnerability class: Broken Access Control

EPSS: 0.007 (48.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Microsoft Account
Microsoft Account

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21396?: CVE-2025-21396 is a high-severity vulnerability in Microsoft Account, classified under Missing Authorization. CVSS score: 8.2/10. Published 2025-01-29.
How severe is CVE-2025-21396?: High severity. CVSS v3 base score is 8.2 out of 10.