This vulnerability (CVE-2026-21045) is an out-of-bounds write (CWE-787) in Samsung Mobile devices, specifically the Samsung Galaxy S25. It enables remote code execution by remote attackers when a user interacts with malicious content such as a crafted webpage or file. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction needed for the attack itself, but user interaction is required to trigger the vulnerability. The vulnerability is published and assigned a high severity score of 8.4. No remediation or patch information has been provided by the vendor yet.

Successful exploitation allows remote attackers to execute arbitrary code on affected Samsung Galaxy S25 devices, potentially compromising device confidentiality, integrity, and availability. The attack requires user interaction (visiting a malicious page or opening a malicious file). No known exploits are currently reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid visiting untrusted websites or opening suspicious files on Samsung Galaxy S25 devices.