CVE-2025-21062 is a vulnerability classified under CWE-327, indicating the use of a broken or risky cryptographic algorithm within Samsung Mobile's Smart Switch application prior to version 3.7.67.2. Smart Switch is a widely used tool for transferring data between Samsung devices or restoring backups. The vulnerability arises because the cryptographic algorithm employed to verify or protect the restoring application is weak or flawed, allowing a local attacker to replace or tamper with the restoring application component. This replacement could lead to unauthorized code execution or manipulation of restored data, compromising confidentiality, integrity, and availability. The attack vector requires local access to the device and user interaction to trigger the exploit, meaning the attacker must convince the user to initiate the restoration process or perform an action that activates the vulnerability. The CVSS 3.1 base score is 7.8, reflecting high severity due to the potential for complete compromise of restored data and system integrity. No known exploits have been reported in the wild, but the vulnerability's presence in a popular mobile utility makes it a significant risk. The lack of a patch link suggests that users should verify they have updated to version 3.7.67.2 or later, where the issue is resolved. The vulnerability's exploitation could allow attackers to implant malicious restoring applications, potentially leading to persistent compromise or data leakage on Samsung mobile devices.

For European organizations, this vulnerability poses a significant risk especially in environments where Samsung mobile devices are used extensively for business operations and data management. The ability for a local attacker to replace the restoring application could lead to unauthorized access to sensitive corporate data during device migration or restoration processes. This could result in data breaches, intellectual property theft, or disruption of business continuity if devices are rendered unstable or compromised. The requirement for user interaction limits remote exploitation but does not eliminate risk, as social engineering or insider threats could facilitate triggering the vulnerability. Organizations with bring-your-own-device (BYOD) policies or shared device environments are particularly vulnerable. The impact extends to regulatory compliance, as data confidentiality breaches could violate GDPR mandates, leading to legal and financial penalties. Additionally, the compromise of mobile devices used for secure communications or authentication could have cascading effects on network security and trust.

1. Ensure all Samsung Smart Switch installations are updated to version 3.7.67.2 or later, where the vulnerability is patched. 2. Restrict local access to devices, especially in corporate environments, to trusted personnel only. 3. Educate users about the risks of interacting with unexpected prompts during device restoration and encourage verification before proceeding. 4. Implement endpoint security solutions that monitor and restrict unauthorized application replacements or modifications on mobile devices. 5. Employ mobile device management (MDM) solutions to enforce application version control and restrict installation of unapproved software. 6. Regularly audit devices for signs of tampering or unauthorized restoration activities. 7. Consider disabling Smart Switch usage in high-risk environments or replacing it with alternative secure data migration tools. 8. Maintain robust backup and incident response plans to quickly recover from potential compromises.