CVE-2021-30740

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A logic issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. A malicious application may be able to execute arbitrary code with kernel privileges.

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

Affected software

VendorProductVersions
AppleiOS and iPadOS>= unspecified, < 14.6
ApplemacOS>= unspecified, < 11.4
ApplemacOS>= unspecified, < 14.6
ApplemacOS>= unspecified, < 7.5

References

Timeline

Published
Sep 8, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-307417.1A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.6 and iPadOS 14.6. Processing a maliciouCVE-2021-307427.8A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 14.5 and iPadOS 14.5. Processing a maliciCVE-2021-307437.8An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security CVE-2021-307446.1Description: A cross-origin issue with iframe elements was addressed with improved tracking of security origins. This issue is fixed in tvOSCVE-2021-307465.5An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 CataCVE-2021-307487.8A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. An application CVE-2021-307498.8Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, CVE-2021-307505.5The issue was addressed with improved permissions logic. This issue is fixed in macOS Big Sur 11.3. A malicious application may be able to aCVE-2021-307515.5This issue was addressed with improved data protection. This issue is fixed in macOS Big Sur 11.4. A malicious application may be able to byCVE-2021-307527.8Processing a maliciously crafted image may lead to arbitrary code execution. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS CVE-2021-307535.5Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, CVE-2021-307556.5Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6,
CVE-2021-30740: High severity, CVSS 7.8 | Vulnix