CVE-2025-21056

Vulnerability

Details

CVE-2025-21056 is an improper input validation vulnerability in Samsung's Retail Mode prior to version 5.59.4. The software fails to sufficiently validate user-supplied input, which can allow a self-attacker (i.e., an attacker with local access to their own device) to escalate privileges and execute arbitrary commands with elevated rights [1].

Exploitation

Prerequisites

The attack requires physical or local access to the device running Retail Mode, and no special network access is needed. Exploitation does not require authentication to the Retail Mode application itself, but the attacker must be able to interact with the vulnerable interface directly on the device [1].

Impact

A successful exploit grants the attacker the ability to execute privileged commands on the device. This could lead to full compromise of the Retail Mode environment and potentially allow further lateral movement or data access on the affected device [1].

Mitigation

Samsung has addressed the vulnerability in Retail Mode version 5.59.4, released in the August 2025 security maintenance release. Users are urged to update to this version or later to remediate the issue [1].