Actively exploited in the wild
Apple Multiple Products WebKit Memory Corruption Vulnerability
Apple - Multiple Products · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-30665
HighCVSS 8.8KEVSummary
A memory corruption issue was addressed with improved state management. This issue is fixed in watchOS 7.4.1, iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Risk Assessment
Enables remote code execution after visiting a malicious website. Apple is aware the issue may have been actively exploited.
Recommendation
Update all Apple devices to the specified OS versions (iOS 14.5.1, iPadOS 14.5.1, watchOS 7.4.1, tvOS 14.6, iOS 12.5.3, macOS Big Sur 11.3.1).
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Original NVD description (English source)
A memory corruption issue was addressed with improved state management. This issue is fixed in watchOS 7.4.1, iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..