CVE-2021-0428: Google Android

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

In getSimSerialNumber of TelephonyManager.java, there is a possible way to read a trackable identifier due to a missing permission check. This could lead to local information disclosure with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-173421434

Affected products

• Google Android: version 10.0 only

Published 2021-04-13. Last modified 2026-06-17.