CVE-2024-21390: Microsoft authenticator improper authentication vulnerability

Microsoft · Authenticator

Microsoft Authenticator Elevation of Privilege Vulnerability

7.1 CVSS 3.1 High EPSS 1.3% · top 31.4% CWE-287 · Improper authentication

7.1CVSS 3.1 base score

1.3%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

Microsoft Authenticator Elevation of Privilege Vulnerability

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Authenticator Microsoft

References

Link	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21390	PatchVendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21390	PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2024-21390), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.