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Vulnerability record · CVE-2021-30721 · published 8 September 2021

CVE-2021-30721: Apple mac os x vulnerability

Apple · Mac Os X

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. An attacker in a privileged network position may be able to leak sensitive user information.

6.5 CVSS 3.1 Medium EPSS 24% · top 2.2%
6.5CVSS 3.1 base score, v2 4.0
24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. An attacker in a privileged network position may be able to leak sensitive user information.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 Vendor Advisory
https://support.apple.com/en-us/HT212530 Vendor Advisory
https://support.apple.com/en-us/HT212531 Vendor Advisory
https://support.apple.com/en-us/HT212529 Vendor Advisory
https://support.apple.com/en-us/HT212530 Vendor Advisory
https://support.apple.com/en-us/HT212531 Vendor 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-2021-30721), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.