CVE-2026-21128: Samsung Mobile Samsung Checkout

Medium severity, CVSS 5.1. EPSS: 0.1% chance of exploitation in the next 30 days.

Improper input validation in CreditCardRegisterActivity of Samsung Checkout prior to version 5.1.03.1 allows local attackers to launch arbitrary activity with Samsung Checkout privileges.

Affected products

• Samsung Mobile Samsung Checkout: before 5.1.03.1 (fixed in 5.1.03.1)

Published 2026-10-12. Last modified 2026-10-15.