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Vulnerability record · CVE-2021-30671 · published 8 September 2021

CVE-2021-30671: Apple mac os x improper input validation vulnerability

Apple · Mac Os X

A validation issue was addressed with improved logic. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. A malicious application may be able to send unauthorized Apple events to Finder.

3.3 CVSS 3.1 Low EPSS 0.56% · top 54.9% CWE-20 · Improper input validation
3.3CVSS 3.1 base score, v2 4.3
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

A validation issue was addressed with improved logic. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. A malicious application may be able to send unauthorized Apple events to Finder.

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

Affected products

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

References

LinkTags
https://support.apple.com/en-us/HT212529 Release NotesVendor Advisory
https://support.apple.com/en-us/HT212530 Release NotesVendor Advisory
https://support.apple.com/en-us/HT212529 Release NotesVendor Advisory
https://support.apple.com/en-us/HT212530 Release NotesVendor 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-2021-30671), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.