Mobile TutorialiPhoneiOS 16.6 turns off verification, and iPhone cannot be downgraded after upgrading to iOS 16.6.1iOS 16.6 turns off verification, and iPhone cannot be downgraded after upgrading to iOS 16.6.1
One week after the official version of iOS 16.6.1 was released, Apple stopped signature verification of iOS 16.6 today, which means that users who have upgraded to the official version of iOS 16.6.1 can no longer downgrade.
Apple typically stops signing older versions of iOS after a new version is released , to encourage customers to keep the operating system up to date, so it's not uncommon for iOS 16.6 updates to no longer be signed. Fortunately, Apple has fixed two vulnerabilities used by the NSO Group in the recently updated iOS 16.6.1 for the Pegasus monitoring software. The tracking numbers of these two vulnerabilities are CVE-2023-41064 and CVE-2023-41061 respectively. Attackers exploit the above vulnerabilities to create images containing malicious code and distribute them through PassKit attachments.
For users of older models, the official version of iOS 16.6.1 is a relatively stable system version and is suitable for retirement.
Since iOS 17 is about to be launched, it is expected that iOS 16 will not bring any new user-oriented features in the future, and will shift to security-focused updates.
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