CVE-2021-30883

KEVApple Multiple Products Memory Corruption Vulnerability

Description

Apple iOS, macOS, watchOS, and tvOS contain a memory corruption vulnerability that could allow for remote code execution.

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..

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

PublishedAug 24, 2021

Last modifiedJun 17, 2026

Added to KEVMay 23, 2022

Remediation dueJun 13, 2022

References

support.apple.com/en-us/HT212846Vendor Advisory
support.apple.com/en-us/HT212868Vendor Advisory
support.apple.com/en-us/HT212869Vendor Advisory
support.apple.com/en-us/HT212872Vendor Advisory
support.apple.com/en-us/HT212874Vendor Advisory
support.apple.com/en-us/HT212876Vendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30883US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1596 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 14.7% · top 3% of all CVEs
Weakness: CWE-787

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.