Overview
The cybersecurity vulnerability identified as CVE-2025-26450 is a significant issue that affects all applications using the IInputMethodSessionWrapper.java. This vulnerability is highly critical because it could potentially allow an untrusted application to inject key and motion events to the default Input Method Editor (IME), leading to local privilege escalation without any need for additional execution privileges. A successful exploit could lead to system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-26450
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Product | Affected Versions
Android OS | All versions
How the Exploit Works
The vulnerability works by exploiting a missing permission check in the onInputEvent of IInputMethodSessionWrapper.java. This allows an attacker to use an untrusted application to inject key and motion events to the default Input Method Editor (IME). This can lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
Conceptual Example Code
Below is a conceptual code snippet that demonstrates how a malicious application might exploit this vulnerability:
// Pseudocode to illustrate the exploit
public class MaliciousApp {
public static void injectKeyAndMotionEvents() {
IInputMethodSessionWrapper wrapper = getWrapperInstance();
KeyEvent keyEvent = createKeyEvent();
MotionEvent motionEvent = createMotionEvent();
// Injecting key and motion events to default IME
wrapper.onInputEvent(keyEvent);
wrapper.onInputEvent(motionEvent);
}
}This code is not functional; it is only a conceptual representation of the potential exploit. The actual exploit might involve more complex techniques to inject malicious events into the default IME.
