Input validation error in Samsung Checkout - CVE-2026-21129
Published: October 6, 2026
Vulnerability identifier: #VU153312
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-21129
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied input in GuestCreditCardRegisterActivity. A local attacker can launch arbitrary activity with Samsung Checkout privileges.
Affected software
Samsung Checkout
How to mitigate CVE-2026-21129
Install updates from vendor's website.
Samsung Checkout - update to 5.1.03.1