EUVD-2026-21848

| CVE-2026-35553 HIGH
2026-04-13 jpcert GHSA-gp9q-xqfw-39jw
8.4
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Apr 13, 2026 - 05:26 vuln.today
Severity Changed
Apr 13, 2026 - 05:22 NVD
MEDIUM HIGH
CVSS Changed
Apr 13, 2026 - 05:22 NVD
6.7 (MEDIUM) 8.4 (HIGH)

Tags

Stack Overflow Buffer Overflow RCE Tosrfec Sys Drfec Sys

Description

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.

Analysis

Stack-based buffer overflow in Dynabook Bluetooth ACPI drivers (tosrfec.sys, drfec.sys) allows local administrators to execute arbitrary code by manipulating specific registry values. This CVSS 8.4 vulnerability requires high privileges (administrative access) but enables complete system compromise with low attack complexity. …

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Remediation

Within 24 hours: Identify all Dynabook systems with tosrfec.sys or drfec.sys drivers installed using hardware inventory tools and isolate any critical systems from general user access. Within 7 days: Contact Dynabook for patch availability timeline and implement compensating controls (see below). …

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Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +42
POC: 0

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EUVD-2026-21848 vulnerability details – vuln.today
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