CVE-2025-58484 identifies a security vulnerability in Samsung Cloud Assistant, a component of Samsung Mobile devices, where incorrect default permissions are set prior to version 8.0.03.8. This vulnerability is classified under CWE-276, which pertains to improper default permissions that can lead to unauthorized access. Specifically, the flaw allows a local attacker—someone with physical or logical access to the device—to access partial data stored within the application's sandbox environment. The sandbox is designed to isolate application data, but due to misconfigured permissions, sensitive data may be exposed to unauthorized local processes or users. The vulnerability does not require any privileges (PR:N), user interaction (UI:N), or authentication, but the attack vector is local (AV:L), meaning remote exploitation is not feasible. The CVSS v3.1 score is 4.0, indicating a medium severity level, primarily impacting confidentiality (C:L) without affecting integrity (I:N) or availability (A:N). No public exploits or active exploitation in the wild have been reported, suggesting limited current risk but potential for future abuse if left unpatched. The vulnerability was reserved in early September 2025 and published in December 2025, with no patch links currently provided, implying that users should monitor for official updates from Samsung. The issue highlights the importance of secure default permission settings in mobile applications to prevent unauthorized data exposure even in sandboxed environments.

For European organizations, the primary impact of CVE-2025-58484 lies in the potential unauthorized disclosure of partial data stored within Samsung Cloud Assistant's sandbox on affected devices. This could lead to leakage of sensitive corporate or personal information if an attacker gains local access to a device, such as through theft, insider threat, or malware with local execution capabilities. Although the vulnerability does not compromise data integrity or device availability, confidentiality breaches can undermine trust, violate data protection regulations like GDPR, and result in reputational damage or compliance penalties. The local attack vector limits the scope to scenarios where an attacker already has some level of device access, reducing the risk of widespread remote exploitation. However, organizations with mobile device management (MDM) policies that allow Samsung Cloud Assistant usage should be aware of this risk, especially in environments with shared or less physically secure devices. The absence of known exploits reduces immediate threat but does not eliminate the need for proactive mitigation to prevent future exploitation.

European organizations should implement the following specific mitigation steps: 1) Immediately verify the version of Samsung Cloud Assistant installed on all corporate Samsung mobile devices and prioritize upgrading to version 8.0.03.8 or later once available. 2) Enforce strict mobile device management (MDM) policies that restrict local access to devices, including strong authentication, device encryption, and remote wipe capabilities to mitigate risks from lost or stolen devices. 3) Limit installation of unnecessary applications and monitor for unauthorized apps that could exploit local vulnerabilities. 4) Educate users on the risks of local device access and encourage secure handling of devices, especially in shared or public environments. 5) Regularly audit device permissions and sandbox configurations to ensure no unintended data exposure occurs. 6) Monitor Samsung’s security advisories for patches or updates related to this vulnerability and apply them promptly. 7) Consider deploying endpoint detection and response (EDR) solutions capable of detecting suspicious local activity that could indicate exploitation attempts. These targeted actions go beyond generic advice by focusing on controlling local access and ensuring timely patching specific to Samsung Cloud Assistant.