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CVE-2021-30856

CRITICAL

9.1

CVSS Score

Published: August 24, 2021 at 06:49 PM UTC

Updated: June 17, 2026 at 03:51 AM UTC

1 product affected across 1 vendormacOS

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Severity

CRITICAL9.1

Exploit prediction

EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%

v < 11.311.0 ≤ v < 11.3

Affected range stops below 11.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISC

Source: [email protected]

https://support.apple.com/en-us/HT212325

CVSS

9.1CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-863

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