CVE-2026-35553: Dynabook Inc Drfec.sys

Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Bluetooth ACPI Drivers provided by Dynabook Inc. contain a stack-based buffer overflow vulnerability. An attacker may execute arbitrary code by modifying certain registry values.

Affected products

• Dynabook Inc Drfec.sys: up to and including v11.0.0.0
• Dynabook Inc Tosrfec.sys: any version

Published 2026-04-13. Last modified 2026-06-17.