CVE-2021-1871

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

02/04/2021

Last modified:

23/10/2025

Description

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.80

Severity 3.x

CRITICAL

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

7.50

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:apple:ipados::::::::		14.4 (excluding)
cpe:2.3:o:apple:iphone_os::::::::		14.4 (excluding)
cpe:2.3:o:apple:mac_os_x::::::::	10.15 (including)	10.15.7 (excluding)
cpe:2.3:o:apple:mac_os_x:10.15.7:-::::::
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020::::::
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update::::::
cpe:2.3:o:apple:macos::::::::	11.0.1 (including)	11.2 (excluding)
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-1871

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools