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CVE-2021-30807

Known Exploited (CISA KEV)HIGH

7.8

CVSS Severity Score

EPSS Score78.4650%

EPSS Percentile92.65th

PublishedOct 19, 2021

Last ModifiedOct 23, 2025

Vulnerability 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.

Affected Platforms (CPE)

💻

Apple

Ipados

< 14.7.1

💻

Apple

Iphone Os

< 14.7.1

💻

Apple

Macos

< 11.5.1

💻

Apple

Watchos

< 7.6.1

References & Advisories

🔗 https://support.apple.com/en-us/HT212622

🔗 https://support.apple.com/en-us/HT212623

🔗 https://support.apple.com/en-us/HT212713

🔗 https://support.apple.com/en-us/HT212622

🔗 https://support.apple.com/en-us/HT212623

🔗 https://support.apple.com/en-us/HT212713

🔗 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30807

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