CVEvulnerability

CVE-2021-1789

8.8 HIGH Known exploited Published 2021-04-02 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Apple Multiple Products Type Confusion Vulnerability — Apple Multiple Products

A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.

Added to KEV
2022-05-04
Remediation due
2022-05-25
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-1789
Status
Analyzed
Published
2021-04-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-843

Description

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.

Affected configurations

• apple ipados (< 14.4) • apple iphone os (< 14.4) • apple mac os x (>= 10.14 < 10.14.6) • apple mac os x (>= 10.15 < 10.15.7) • apple mac os x 10.14.6 • apple mac os x 10.15.7 • apple macos (>= 11.0 < 11.2) • apple tvos (< 14.4) • apple watchos (< 7.3) • fedoraproject fedora 32 • fedoraproject fedora 33 • webkitgtk webkitgtk (< 2.30.6)

Related

Weakness · CWE (1)

  • CWE-843 Access of Resource Using Incompatible Type weakness

References