CVE-2021-30883

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 iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. 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
AppleiOS and iPadOS>= unspecified, < 15.0
AppleiOS and iPadOS>= unspecified, < 14.8
ApplemacOS>= unspecified, < 12.0
ApplemacOS>= unspecified, < 11.6
ApplemacOS>= unspecified, < 8.1
ApplemacOS>= unspecified, < 15.1

References

Timeline

Published
Aug 24, 2021
Last modified
Jun 17, 2026
Added to CISA KEV
May 23, 2022
NVD status
Analyzed

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CVE-2021-30883: High severity, CVSS 7.8 | Vulnix