CVE-2024-21390: Microsoft Authenticator Elevation of Privilege Vulnerability
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 1.3%
EPSS score, percentile 69.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 7.1 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- from 1.0.0 to before 6.2401.0617
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Microsoft Authenticator Elevation of Privilege Vulnerability
Microsoft Authenticator Elevation of Privilege Vulnerability
Source: CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | from 1.0.0 to before 6.2401.0617 |
Source: CVE List, as of . About the data.
Weakness
CWE-287
- CWE-287: Improper Authentication
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
Known exploited Microsoft vulnerabilities
- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
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- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
- CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability