Apple · Macos Big Sur · CVE-2021-30758
**Name of the Vulnerable Software and Affected Versions**
Safari versions prior to 14.1.2
iOS versions prior to 14.7
macOS Big Sur versions prior to 11.5
watchOS versions prior to 7.6
tvOS versions prior to 14.7
WebKitGTK, WPE WebKit (affected versions not specified)
**Description**
The issue is related to a type confusion problem with errors in data type conversion. Exploitation of this issue may allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service using malicious web content. Processing maliciously crafted web content may lead to arbitrary code execution.
**Recommendations**
For Safari versions prior to 14.1.2, update to Safari 14.1.2 or later.
For iOS versions prior to 14.7, update to iOS 14.7 or later.
For macOS Big Sur versions prior to 11.5, update to macOS Big Sur 11.5 or later.
For watchOS versions prior to 7.6, update to watchOS 7.6 or later.
For tvOS versions prior to 14.7, update to tvOS 14.7 or later.
For WebKitGTK, WPE WebKit, at the moment, there is no information about a newer version that contains a fix for this vulnerability.