CVE-2026-21055 Samsung Mobile CVE debrief

Who should care

Users of Bixby versions prior to 4.0.70.8 should update to the latest version to prevent local attackers from executing arbitrary commands with Bixby privilege. This includes Bixby operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the security of Bixby deployments.

Technical summary

The vulnerability is caused by improper export of android application components in Bixby prior to version 4.0.70.8. This allows local attackers to execute arbitrary commands with Bixby privilege. The issue has a high CVSS score of 8.5, indicating a significant risk to affected systems. The vulnerability affects Bixby deployments, and defenders should focus on updating Bixby to version 4.0.70.8 or later.

Defensive priority

High priority due to high CVSS score of 8.5 and potential for local attackers to execute arbitrary commands.

Recommended defensive actions

• Update Bixby to version 4.0.70.8 or later
• Restrict access to Bixby components
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

Evidence is limited, but the CVE record and NVD detail provide some information about the vulnerability. The CVE record was published on 2026-07-10T05:16:36.217Z and has not been modified since then. The vulnerability is caused by improper export of android application components in Bixby prior to version 4.0.70.8. This allows local attackers to execute arbitrary commands with Bixby privilege. However, the scope of affected systems and potential impact on enterprise environments is not well understood. Defenders should verify Bixby deployments, review official advisories, and monitor for suspicious activity.

Official resources