CVE-2025-21076 is a vulnerability classified under CWE-280, indicating improper handling of insufficient permissions or privileges within the Samsung Account application on Samsung Mobile devices. This flaw exists in versions prior to 15.5.00.18 and allows a local attacker to access sensitive data stored in the Samsung Account. The vulnerability arises because the application does not correctly enforce permission checks, enabling unauthorized data access when certain conditions are met. Exploitation requires the attacker to have local access to the device and to convince the user to perform some interaction, such as clicking a link or opening a file, which triggers the vulnerability. The vulnerability affects confidentiality by exposing user data but does not impact data integrity or system availability. The CVSS v3.1 score of 5.5 reflects a medium severity, considering the attack vector is local (AV:L), the attack complexity is low (AC:L), no privileges are required (PR:N), but user interaction is necessary (UI:R). The scope remains unchanged (S:U), and the impact is high on confidentiality (C:H) with no impact on integrity (I:N) or availability (A:N). There are no known exploits in the wild at this time, and no official patch links were provided, but upgrading to version 15.5.00.18 or later is recommended. This vulnerability is significant because Samsung Account often stores sensitive personal and business data, including contacts, calendar events, and device backups, which could be exposed by this flaw.

For European organizations, the primary impact of CVE-2025-21076 is the potential unauthorized disclosure of sensitive user data stored within Samsung Account applications on employee devices. This could lead to privacy violations, leakage of confidential business information, and potential compliance issues under GDPR if personal data is exposed. The vulnerability requires local access and user interaction, limiting remote exploitation but increasing risk in environments where devices are shared, lost, or physically accessed by unauthorized personnel. Sectors such as finance, healthcare, and government, which often use Samsung devices and handle sensitive data, are particularly at risk. The exposure of account data could facilitate further attacks, including social engineering or identity theft. Although integrity and availability are not affected, the confidentiality breach alone can have significant reputational and regulatory consequences for affected organizations.

To mitigate CVE-2025-21076, organizations should ensure all Samsung devices are updated to Samsung Account version 15.5.00.18 or later, where the vulnerability is addressed. Until updates are applied, restrict physical and local access to devices, especially in shared or public environments. Implement strict device usage policies, including screen locks and biometric authentication, to prevent unauthorized local access. Educate users about the risks of interacting with unsolicited prompts or links that could trigger the vulnerability. Employ mobile device management (MDM) solutions to enforce application updates and monitor device compliance. Additionally, consider disabling Samsung Account features on devices where it is not required, reducing the attack surface. Regularly audit device security posture and review access logs for suspicious activity. Finally, maintain an incident response plan to quickly address any suspected data exposure.