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Apple Makes A Crucial iPhone Update Call — Hundreds Of Millions Must Act Now

Apple mandates immediate updates to iOS 26 or iOS 18.7.3 security patches for hundreds of millions of iPhones to address 25 critical vulnerabilities, including zero-day exploits.

  • In December, Apple decided that hundreds of millions of iPhone users must update to iOS 26 soon, ending indefinite delays for most devices.
  • Security-Focused iOS 26.2 delivered 25 security fixes while earlier 26.x updates addressed a FontParser flaw and more than 51 other issues, with two zero-day WebKit vulnerabilities reported as exploited in the wild.
  • Compatibility shows that every iPhone 11 and later can run iOS 26, while the iPhone XS, iPhone XS Max and iPhone XR cannot and received iOS 18.7.3 as a limited-security branch.
  • Users are urged to install iOS 26.2 or iOS 18.7.3 now, with adoption estimates at 16% by StatCounter and around 60% by TelemetryDeck; Apple details steps via Settings menu.
  • This coming week, iOS 26.3 is expected for general release with iOS 18.7.4 as a companion patch limited to the XS, XS Max, and XR models.
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Tom's Guide broke the news in on Sunday, January 18, 2026.
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