A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.
Published 2021-04-02 18:15:22
Updated 2021-06-02 13:19:48
Source Apple Inc.
View at NVD,   CVE.org

CVE-2021-1789 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Apple Multiple Products Type Confusion Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.
Added on 2022-05-04 Action due date 2022-05-25

Exploit prediction scoring system (EPSS) score for CVE-2021-1789

Probability of exploitation activity in the next 30 days: 0.82%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 80 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-1789

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2021-1789

References for CVE-2021-1789

Products affected by CVE-2021-1789

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