CVE-2026-21112: Samsung Tips Privilege Escalation Flaw

CVE-2026-21112 Overview

CVE-2026-21112 is an improper input validation vulnerability [CWE-20] in the Samsung Tips application on Samsung devices running versions prior to Android 17. A local attacker can abuse this flaw to launch arbitrary activities with the privileges of the Samsung Tips application. Exploitation requires user interaction on the affected device.

Samsung addressed this issue in the September 2026 Samsung Mobile Security Maintenance Release. The vulnerability was assigned a medium severity rating and does not have a known public exploit or CISA KEV listing.

Critical Impact
A local attacker with low privileges can trigger arbitrary activity launches within the Samsung Tips application context, enabling access to functionality that should be restricted from unauthorized callers.

Affected Products

Samsung Tips application on Samsung Android devices
All versions of Samsung Tips prior to the Android 17 release
Samsung mobile devices receiving the September 2026 Security Maintenance Release

Discovery Timeline

2026-09-09 - CVE-2026-21112 published to NVD
2026-09-10 - Last updated in NVD database

Technical Details for CVE-2026-21112

Vulnerability Analysis

The vulnerability resides in the Samsung Tips application, a preinstalled Samsung application that provides device usage guidance. The application fails to properly validate input passed to one of its exported components. As a result, a local application on the same device can craft a request that causes Samsung Tips to launch an arbitrary activity within its own process context.

Because the launched activity inherits the Samsung Tips privilege level, the attacker gains the ability to invoke functionality that would otherwise be inaccessible to a low-privileged third-party application. The flaw is classified under Improper Input Validation and does not require network access.

Root Cause

Samsung Tips accepts data from an inter-process communication (IPC) channel without adequately validating the target component identifier or associated parameters. This allows a caller to redirect the internal activity dispatch to a component that the calling application should not be able to reach directly. The root cause pattern matches typical Android intent redirection weaknesses where untrusted extras control activity launch decisions.

Attack Vector

Exploitation requires local access to the device and user interaction. A malicious application installed on the device sends a crafted intent or IPC message to the vulnerable Samsung Tips component. The user must perform an action, such as tapping a prompt or opening a screen, for the vulnerability to trigger. The confidentiality impact is high because the launched activity can expose data controlled by Samsung Tips, while integrity and availability are not affected.

No verified proof-of-concept code is available. Refer to the Samsung Mobile Security Update for vendor-provided technical details.

Detection Methods for CVE-2026-21112

Indicators of Compromise

Installation of unknown or sideloaded Android applications that request the ability to send intents to com.samsung.android.app.tips.
Unexpected activity launches originating from the Samsung Tips application shortly after third-party app interaction.
User reports of unusual prompts or screens appearing within Samsung Tips.

Detection Strategies

Inspect installed applications on managed Samsung devices for packages that declare intent filters targeting Samsung Tips components.
Correlate mobile threat defense telemetry for suspicious IPC or intent activity involving preinstalled Samsung packages.
Review application install sources and flag devices that have installed apps from outside the Galaxy Store or Google Play.

Monitoring Recommendations

Enroll Samsung devices in a mobile device management (MDM) or unified endpoint management (UEM) solution that reports OS build and Samsung Security Maintenance Release (SMR) level.
Alert when devices fall behind the September 2026 SMR patch level.
Track app installation events on managed devices to identify newly installed third-party applications that could serve as a local attack stager.

How to Mitigate CVE-2026-21112

Immediate Actions Required

Apply the September 2026 Samsung Security Maintenance Release to all affected Samsung devices.
Verify the Android security patch level on each device reflects the September 2026 update or later.
Restrict installation of applications from unknown sources through MDM policy.
Educate users to avoid interacting with unexpected prompts originating from preinstalled applications.

Patch Information

Samsung released the fix as part of the September 2026 Samsung Mobile Security Maintenance Release. Full details, affected models, and update availability are documented in the Samsung Mobile Security Update bulletin. Users should install updates through Settings → Software update → Download and install.

Workarounds

Uninstall or disable the Samsung Tips application on devices that cannot receive the update, where supported by device policy.
Enforce Google Play Protect scanning and block sideloaded applications through enterprise policy.
Limit device provisioning to trusted app catalogs until the patch is deployed.

bash

# Verify Samsung Android security patch level via ADB
adb shell getprop ro.build.version.security_patch

# Expected output should be 2026-09-01 or later
# List Samsung Tips package details to confirm version
adb shell dumpsys package com.samsung.android.app.tips | grep versionName