What is CVE-2021-30821?

CVE-2021-30821 is a high-severity vulnerability in Apple macOS. CVSS score: 7.8/10. Published 2021-10-28.

How severe is CVE-2021-30821?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Apple macOS

CVE-2021-30821

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.

EPSS: 0.010 (60.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Apple Macos — versions unspecified
Apple Mac_os_x — versions 10.15.7

References

product-security@apple.com (x_refsource_MISC, Vendor Advisory)
product-security@apple.com (x_refsource_MISC, Vendor Advisory)
product-security@apple.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-30821?: CVE-2021-30821 is a high-severity vulnerability in Apple macOS. CVSS score: 7.8/10. Published 2021-10-28.
How severe is CVE-2021-30821?: High severity. CVSS v3 base score is 7.8 out of 10.