CVE-2021-30720

MediumCVSS 5.4/10Last modified Jun 17, 2026

Description

A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

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

Related CVEs from 2021

CVE-2021-307216.5A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, CVE-2021-307225.9An information disclosure issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 202CVE-2021-307235.5An information disclosure issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 202CVE-2021-307247.8This issue was addressed with improved checks. This issue is fixed in tvOS 14.6, Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, CVE-2021-307257.8A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 CVE-2021-307267.8A malicious application may be able to execute arbitrary code with kernel privileges. This issue is fixed in macOS Big Sur 11.4, Security UpCVE-2021-307275.5A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and CVE-2021-307287.8An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-00CVE-2021-307297.5A logic issue was addressed with improved restrictions. This issue is fixed in iOS 14.6 and iPadOS 14.6. A device may accept invalid activatCVE-2021-307315.5This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Catalina. An unprivilegedCVE-2021-307335.5An out-of-bounds read was addressed with improved input validation. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security UpdCVE-2021-307348.8Multiple 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-2021-30720: Medium severity, CVSS 5.4 | Vulnix