CVE-2025-21080 is a vulnerability classified under CWE-926 (Improper Export of Android Application Components) found in Samsung Mobile devices specifically within the Dynamic Lockscreen application prior to the SMR (Security Maintenance Release) December 2025 Release 1. The flaw arises because certain Android application components are improperly exported, allowing local attackers to access files and resources with the privileges assigned to the Dynamic Lockscreen app. This improper export means that components intended to be private or restricted are accessible to other local applications or users without proper permission checks. The vulnerability has a CVSS v3.1 base score of 6.2, reflecting medium severity. The attack vector is local (AV:L), requiring the attacker to have physical or local access to the device. No privileges are required (PR:N), no user interaction is needed (UI:N), and the scope is unchanged (S:U). The impact affects integrity (I:H) but not confidentiality or availability. This means an attacker can modify or corrupt data accessible by the Dynamic Lockscreen app but cannot read sensitive information or disrupt device availability. No known exploits have been reported in the wild, and no patches are linked yet, though the issue is expected to be resolved in the December 2025 SMR update. The vulnerability was reserved in November 2024 and published in December 2025 by SamsungMobile. The improper export of components is a common Android security issue where exported activities, services, or content providers are accessible beyond intended boundaries, leading to privilege escalation or unauthorized access. In this case, the Dynamic Lockscreen app’s files are exposed, potentially allowing local attackers to manipulate lockscreen behavior or related data.

For European organizations, the impact of CVE-2025-21080 is primarily on the integrity of data managed by the Dynamic Lockscreen application on Samsung Mobile devices. While confidentiality and availability are not directly affected, unauthorized modification of lockscreen data or related files could lead to bypassing security controls or altering user experience, potentially facilitating further attacks or unauthorized access. Organizations relying on Samsung Mobile devices for secure communications or mobile workforce management could face risks if attackers gain local access to devices, such as through theft or insider threats. The medium severity score reflects that exploitation requires local access and does not compromise confidentiality, but the integrity impact could undermine trust in device security. In sectors like finance, government, and critical infrastructure where mobile device security is paramount, this vulnerability could be leveraged as part of a multi-stage attack. The absence of known exploits reduces immediate risk but does not eliminate the need for timely remediation. The vulnerability also highlights the importance of secure application component configuration in mobile device management strategies.

1. Apply the Samsung Mobile Security Maintenance Release (SMR) December 2025 Release 1 or later as soon as it becomes available, as this update is expected to fix the improper export issue. 2. Until patching is possible, restrict physical and local access to Samsung Mobile devices, enforcing strict device control policies to prevent unauthorized local exploitation. 3. Utilize Mobile Device Management (MDM) solutions to monitor and control application permissions and exported components where possible. 4. Conduct audits of installed applications on Samsung devices to identify any suspicious or unnecessary exported components. 5. Educate users about the risks of local device access and encourage strong device locking mechanisms (PIN, biometrics) to reduce the likelihood of local attacker access. 6. Implement endpoint detection and response (EDR) tools capable of detecting anomalous local activity on mobile devices. 7. Collaborate with Samsung support channels to receive timely updates and advisories related to this vulnerability. 8. For sensitive environments, consider temporary restrictions on the use of affected Samsung devices until patches are applied.