One UI 9 on Galaxy S26: Three new security features explained
Samsung’s One UI 9.0 Beta is already running on the Galaxy S26, and most of the coverage has gone to the creative tools and accessibility changes. The security upgrades have been quieter, but they’re worth understanding.
New security features of One UI 9 are inspired by Android 17. Google has long been focused on security and privacy aspects, and version 17 is no exception. One UI 9 has three big improvements for security.
One UI 9.0 on Galaxy S26 enhances security
Android 17’s contacts picker limits what data apps can see in the first place. Auto Blocker’s high-risk detection stops dangerous apps from running even after they’ve landed on the device.
The Security Report gives you visibility over what’s been blocked. Maximum Restrictions closes the physical attack surface for users who need that level of control.
Proactive high-risk app detection
Previous versions of Auto Blocker were largely preventive; they stopped you from installing apps from unauthorized sources. In One UI 9, the Auto Blocker can detect a high-risk app that’s already on your device and stop it from running.
When something trips the detection, you get a warning, the app is blocked from executing or installing further components, and the system recommends deletion.
A companion feature called Manage Unknown Apps handles the discovery side of this. It gathers every app installed from outside the Play Store or Galaxy Store into one place.
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Auto Blocker’s new Security Report
Auto Blocker has been part of One UI since version 6, but it’s always worked silently. However, Samsung’s new One UI 9 changes that with a Security Report section inside Auto Blocker.
It logs every time the system blocks an app from an unknown source. The last seven days show up as a list; switch to the Month tab, and you get a graph. It’s a small UX addition, but it makes the feature visible in a way it never has been before.
Full USB connection blocking
Auto Blocker’s Maximum Restrictions mode is the strictest setting. In One UI 8.5, that mode blocked USB commands but left the physical connection open. In One UI 9, Maximum Restrictions cuts off the USB connection entirely.
This prevents unexpected attacks where a compromised public charging port attempts to push data or software to your phone, and physical data-extraction attempts that work at the hardware level rather than through software.
Well, it’s an opt-in mode, not a default.
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