CVE-2021-25471: Google Android

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A lack of replay attack protection in Security Mode Command process prior to SMR Oct-2021 Release 1 can lead to denial of service on mobile network connection and battery depletion.

Affected products

• Google Android: version 8.1 only; version 9.0 only; version 10.0 only

Published 2021-10-06. Last modified 2026-06-17.