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CVE-2021-1789

Known Exploited (CISA KEV)HIGH
8.8
CVSS Severity Score
EPSS Score64.2490%
EPSS Percentile94.76th
PublishedApr 2, 2021
Last ModifiedOct 23, 2025

Vulnerability 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 Platforms (CPE)

💻
Apple

Ipados

< 14.4
💻
Apple

Iphone Os

< 14.4
💻
Apple

Mac Os X

>= 10.14 and < 10.14.6
💻
Apple

Mac Os X

>= 10.15 and < 10.15.7
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.14.6
💻
Apple

Mac Os X

= 10.15.7
💻
Apple

Mac Os X

= 10.15.7
💻
Apple

Macos

>= 11.0 and < 11.2
💻
Apple

Tvos

< 14.4
💻
Apple

Watchos

< 7.3
💻
Fedoraproject

Fedora

= 32
💻
Fedoraproject

Fedora

= 33
📦
Webkitgtk

Webkitgtk

< 2.30.6

References & Advisories

🔗 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/
🔗 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
🔗 https://security.gentoo.org/glsa/202104-03
🔗 https://support.apple.com/en-us/HT212146
🔗 https://support.apple.com/en-us/HT212147
🔗 https://support.apple.com/en-us/HT212148
🔗 https://support.apple.com/en-us/HT212149
🔗 https://support.apple.com/en-us/HT212152

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