CVE-2021-30748

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-08 · updated 2026-06-17
Weakness: CWE-787

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. An application may be able to execute arbitrary code with kernel privileges.

Affected products

Apple iPadOS: before 14.7 — fixed in 14.7
Apple Iphone Os: before 14.7 — fixed in 14.7
Apple macOS: before 11.5 — fixed in 11.5
Apple tvOS: before 14.7 — fixed in 14.7

How to fix

Upgrade to a fixed version: Apple iPadOS 14.7; Apple Iphone Os 14.7; Apple macOS 11.5; Apple tvOS 14.7. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/HT212601
https://support.apple.com/en-us/HT212602
https://support.apple.com/kb/HT212604
https://support.apple.com/en-us/HT212601
https://support.apple.com/en-us/HT212602
https://support.apple.com/kb/HT212604

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