CVE-2021-25347: Hijacking in Samsung Email

The hijacking vulnerability in Samsung Email allows an attacker to intercept the execution of providers. This means that if a user interacts with a provider within the email application (e.g., opening a specific attachment or link), the attacker could potentially inject malicious code or redirect the execution flow. The impact could range from data theft (accessing sensitive information within emails) to more severe consequences like remote code execution, depending on the provider's functionality and the attacker's capabilities. While the specific attack vectors are not detailed in the CVE description, the potential for provider hijacking presents a significant security risk.

1. Reserved2021-01-19
2. Published2021-03-04
3. Modified2024-08-03
4. EPSS updated2026-04-02

The primary mitigation for CVE-2021-25347 is to immediately upgrade the Samsung Email application to SMR Feb-2021 Release 1 or later. This update contains the necessary fixes to prevent the provider hijacking vulnerability. If upgrading is not immediately feasible due to compatibility issues or testing requirements, consider restricting user access to potentially malicious providers or implementing stricter email filtering policies. Monitor email traffic for unusual provider execution patterns. After upgrading, confirm the fix by attempting to trigger a provider execution and verifying that it behaves as expected without any signs of interception or malicious activity.