Calif demonstrates an untethered jailbreak on the iPhone 18 Pro

The Hexacon demo restored root access after a reboot on iOS 27.0.1; Calif has not disclosed the vulnerabilities or released a tool.

By · Published

Primary source: X

Why it matters

Calif's demo shows persistent root access on an iPhone 18 Pro running iOS 27.0.1, giving its security-services business a public example of its research. Because Calif has not disclosed the vulnerabilities or released a tool, the demo does not establish how iPhone users could be affected.

At a Paris security conference, a presenter raises a smartphone before an audience beneath a Calif stage sign.

Calif demonstrated an untethered jailbreak on an iPhone 18 Pro running iOS 27.0.1 at the Hexacon security conference in Paris on October 16th, showing root access return after a reboot without a computer connected. For founder Thai Duong (@thaidn), whose career spans a dozen years in Google security research, the stage demonstration puts the firm's vulnerability research in front of potential security clients and Apple.…

Reader comments

Conversation for this story loads after sign-in.