CVE-2026-21047
Samsung · Samsung Mobile Devices
Samsung mobile devices are vulnerable to an out-of-bounds write in the ImsService, potentially allowing remote attackers to execute arbitrary code.
Executive summary
An out-of-bounds write vulnerability in the ImsService of Samsung mobile devices could allow unauthenticated remote attackers to execute arbitrary code, necessitating an immediate security update.
Vulnerability
This is an out-of-bounds write vulnerability (CWE-787) in the ImsService component. The vulnerability is remotely exploitable without requiring user interaction or authentication, which significantly increases the risk of the flaw.
Business impact
The CVSS score of 8.3 reflects the high risk posed by this vulnerability, particularly due to the lack of required authentication. Successful exploitation could allow an attacker to compromise mobile devices, leading to the theft of sensitive personal or corporate data, unauthorized tracking, or the installation of malicious software on the device.
Remediation
Immediate Action: Ensure all Samsung mobile devices are updated to the SMR July 2026 Release 1 or later to address the ImsService vulnerability.
Proactive Monitoring: Utilize Mobile Device Management (MDM) solutions to enforce security updates and monitor for anomalous behavior on mobile endpoints.
Compensating Controls: If devices cannot be patched immediately, restrict their use in high-security environments and monitor network traffic for suspicious patterns originating from mobile devices.
Exploitation status
Public Exploit Available: No (exploit_available: false)
Analyst recommendation
This vulnerability is critical due to the lack of authentication and potential for remote code execution. Security teams should prioritize the deployment of the July 2026 security updates across all managed Samsung mobile devices to mitigate the risk of compromise.