CVE-2025-21080 is a vulnerability classified under CWE-926 (Improper Export of Android Application Components) affecting Samsung Mobile devices' Dynamic Lockscreen feature prior to the SMR Dec-2025 Release 1 update. The flaw arises because certain Android application components within the Dynamic Lockscreen are improperly exported, meaning they are accessible to other local applications or users without appropriate permission checks. This improper export allows a local attacker—someone with physical or local access to the device but without elevated privileges—to exploit the vulnerability to access files and data that should be protected under the Dynamic Lockscreen's privilege boundary. The vulnerability does not require user interaction or prior authentication, making it easier to exploit once local access is obtained. The impact primarily affects the integrity of the device's data, as attackers could potentially read or modify files that are normally restricted. However, confidentiality and availability impacts are not indicated. The vulnerability has a CVSS v3.1 base score of 6.2, reflecting a medium severity level, with an attack vector limited to local access, low attack complexity, no privileges required, and no user interaction needed. There are currently no known exploits in the wild, and no official patches have been linked, although the issue is addressed in the SMR Dec-2025 Release 1 update. This vulnerability highlights the risks of improper component export in Android applications, which can lead to privilege escalation or unauthorized data access on mobile devices.

For European organizations, the primary impact of CVE-2025-21080 lies in the potential for local attackers to gain unauthorized access to sensitive files on Samsung Mobile devices through the Dynamic Lockscreen application. This could lead to data integrity issues, such as unauthorized modification or tampering with lockscreen-related data or configurations. While confidentiality and availability impacts are not explicitly noted, the ability to access files with elevated privileges could facilitate further attacks or data leakage if combined with other vulnerabilities or social engineering. Organizations with mobile workforces relying on Samsung devices may face increased risk, especially in environments where physical device access is less controlled, such as field operations or shared workspaces. The vulnerability could also undermine trust in device security, potentially impacting compliance with data protection regulations like GDPR if sensitive personal or corporate data is exposed or altered. Since exploitation requires local access but no authentication or user interaction, insider threats or theft scenarios are of particular concern. The absence of known exploits in the wild reduces immediate risk but does not eliminate the need for vigilance and timely patching.

1. Monitor Samsung Mobile security advisories closely and apply the SMR Dec-2025 Release 1 update or any subsequent patches as soon as they become available to remediate the vulnerability. 2. Implement strict physical security controls to limit local access to devices, including enforcing device lock policies, secure storage, and employee awareness training about device handling. 3. Use mobile device management (MDM) solutions to enforce security policies, monitor device integrity, and restrict installation of untrusted applications that could exploit the vulnerability locally. 4. Audit and restrict permissions for applications that can interact with the Dynamic Lockscreen or related components to reduce the attack surface. 5. Employ endpoint detection and response (EDR) tools capable of detecting anomalous local activity indicative of exploitation attempts. 6. Educate users about the risks of leaving devices unattended and the importance of reporting lost or stolen devices promptly. 7. Consider additional encryption or containerization solutions for sensitive data on mobile devices to mitigate potential unauthorized access. 8. For high-risk environments, consider restricting use of affected Samsung devices until patches are applied.