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Improper handling of insufficient permission in SyncClientProvider in Samsung Internet installed on non-Samsung Device prior to version 28.0.0.59 allows local attackers to access read and write arbitrary files.

CVE-2025-20994 is a medium severity vulnerability identified in Samsung Internet, specifically in the SyncClientProvider component when installed on non-Samsung devices prior to version 28.0.0.59. The vulnerability arises from incorrect default permissions (CWE-276), which lead to improper handling of insufficient permission checks. This flaw allows local attackers to gain unauthorized read and write access to arbitrary files on the affected device. The attack vector is local (AV:L), requiring the attacker to have local access to the device, and the attack complexity is high (AC:H), indicating that exploitation is not straightforward. No privileges are required (PR:N), but user interaction is necessary (UI:R), meaning the attacker must trick the user into performing some action to exploit the vulnerability. The scope is unchanged (S:U), and the impact on confidentiality, integrity, and availability is low (C:L/I:L/A:L), reflecting limited but non-negligible damage potential. The vulnerability is specific to Samsung Internet browser installations on non-Samsung devices, which suggests that the issue stems from a misconfiguration or oversight in permission settings for this particular environment. There are no known exploits in the wild, and no patches have been linked yet, indicating that mitigation may currently rely on vendor updates or workarounds. The vulnerability could allow an attacker with local access to manipulate files arbitrarily, potentially leading to data leakage, data corruption, or disruption of normal browser operations, but the requirement for local access and user interaction limits the attack surface.

Detailed information about CVE-2025-20994: CWE-276: Incorrect Default Permissions in Samsung Mobile Samsung Internet affecting Samsung Mobile Samsung Internet. 

CVE-2025-20994: CWE-276: Incorrect Default Permissions in Samsung Mobile Samsung Internet - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-20994: CWE-276: Incorrect Default Permissions in Samsung Mobile Samsung Internet

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