CVE-2021-1789

8.8 highKEVEPSS 14%

High (8.8) in Apple Multiple Products. In CISA KEV since 2022-05-04. EPSS 14% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 14% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2022-05-04, due 2022-05-25
CWE: CWE-843
Published: 2021-04-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:ipados
apple:iphone_os
apple:mac_os_x
apple:macos
apple:tvos
apple:watchos
fedoraproject:fedora
webkitgtk:webkitgtk

References

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

Check your stack JSON