CVE-2021-30807

HighCVSS 7.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
ApplemacOS>= unspecified, < 11.5
ApplemacOS>= unspecified, < 14.7
ApplemacOS>= unspecified, < 7.6

References

Timeline

Published
Oct 19, 2021
Last modified
Jun 17, 2026
Added to CISA KEV
Nov 3, 2021
NVD status
Analyzed

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CVE-2021-30807: High severity, CVSS 7.8 | Vulnix