CVE-2021-0963: Google Android

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In onCreate of KeyChainActivity.java, there is a possible way to use an app certificate stored in keychain due to a tapjacking/overlay attack. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-9Android ID: A-199754277

Affected products

• Google Android: version 9.0 only; version 10.0 only; version 11.0 only; version 12.0 only

Published 2021-12-15. Last modified 2026-06-17.