CVE-2021-30856

CriticalCVSS 9.1/10Last modified Jun 17, 2026

Description

This issue was addressed by adding a new Remote Login option for opting into Full Disk Access for Secure Shell sessions. This issue is fixed in macOS Big Sur 11.3. A malicious unsandboxed app on a system with Remote Login enabled may bypass Privacy preferences.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Aug 24, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-308577.0A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvCVE-2021-308588.8A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. PCVE-2021-308597.8A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, SecuCVE-2021-308607.8An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPaCVE-2021-308615.5A logic issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.0.1. A malicious application may bypassCVE-2021-308626.1A validation issue was addressed with improved input sanitization. This issue is fixed in iTunes U 3.8.3. Processing a maliciously crafted UCVE-2021-308636.8This issue was addressed by improving Face ID anti-spoofing models. This issue is fixed in iOS 15 and iPadOS 15. A 3D model constructed to lCVE-2021-308648.6A logic issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.0.1. A sandboxed process may be able toCVE-2021-308657.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.6, Security Update 2021-005 CataCVE-2021-308666.5A user privacy issue was addressed by removing the broadcast MAC address. This issue is fixed in tvOS 15, watchOS 8, iOS 15 and iPadOS 15. ACVE-2021-308675.5The issue was addressed with improved authentication. This issue is fixed in iOS 15 and iPadOS 15. A malicious application may be able to acCVE-2021-308687.0A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.1. A malicious applic
CVE-2021-30856: Critical severity, CVSS 9.1 | Vulnix