CVE-2021-0334

HIGH

Android 8.1-11 - Local Privilege Escalation via ResolverActivity Default Handler Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-0334. PoCs published by ShaikUsaf.

AI-analyzed exploit summary This repository contains performance test cases for Android's autofill framework, specifically targeting CVE-2021-0334. The code includes test cases for autofill functionality but does not contain an actual exploit. It appears to be part of a performance testing suite rather than an exploit PoC.

Description

In onTargetSelected of ResolverActivity.java, there is a possible settings bypass allowing an app to become the default handler for arbitrary domains. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-163358811

Exploits (1)

nomisec WRITEUP
by ShaikUsaf · poc
https://github.com/ShaikUsaf/frameworks_base_AOSP10_r33_CVE-2021-0334

This repository contains performance test cases for Android's autofill framework, specifically targeting CVE-2021-0334. The code includes test cases for autofill functionality but does not contain an actual exploit. It appears to be part of a performance testing suite rather than an exploit PoC.

Classification
Writeup 90%
Attack Type
Other
Complexity
Moderate
Reliability
Theoretical
Target: Android Autofill Framework (AOSP 10 r33)
No auth needed
Prerequisites: Android device with autofill framework · Access to performance testing environment
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2021-02-01

Scores

CVSS v3 7.8
EPSS 0.0028
EPSS Percentile 19.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-732
Status published
Products (4)
google/android 8.1
google/android 9.0
google/android 10.0
google/android 11.0
Published Feb 10, 2021
Tracked Since Feb 18, 2026