CVE-2026-21055
Local privilege escalation in Samsung Bixby allows arbitrary command execution.
Is CVE-2026-21055 being exploited?
Not confirmed. CVE-2026-21055 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.17% probability of exploitation in the next 30 days.
How severe is CVE-2026-21055?
CVE-2026-21055 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-21055?
Yes. A fix has been recorded for CVE-2026-21055. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21055 affect?
CVE-2026-21055 affects Samsung Bixby versions prior to 4.0.70.8, Android devices with Bixby (Samsung Galaxy series). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21055?
Update Bixby to 4.0.70.8+ and apply OS/device security updates immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker can execute arbitrary commands with Bixby privileges, enabling privilege escalation, data access, or persistence on affected devices.
Patch when possible