A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. This issue is fixed in tvOS 14.6 Security Update 2021-004 Mojave iOS 14.6 and iPadOS 14.6 iOS 12.5.4 Security Update 2021-003 Catalina macOS Big Sur 11.4 watchOS 7.5. Processing a maliciously crafted certificate may lead to arbitrary code execution.