According to Apple, the patch fixes a major security loophole that appears to have been used in what it called a “highly advanced attack” aimed at select users.

Apple describes this vulnerability as involving the processing of a malicious image file, which could result in memory corruption, and notes that the issue may have been exploited

Apple has issued a security upgrade for iOS 18, iPadOS 18, and macOS. The update addresses a critical vulnerability, CVE-2025-43300. It impacts iPhone XS and later, several iPad Pro, iPad Air, and iPad mini models.