CVE-2026-18768: Insufficient IOCTL access control allows local access to arbitrary physical memory
Published Nov 11, 2026
·Updated
A local low privileged attacker can access arbitrary physical memory or define its mapping via TcRouter.sys because of exposed IOCTL function calls resulting in a full compromise of the affected devices.
Affected Software
1 affected component
TcRouter.sys
Event History
Nov 11, 2026
CVE Published
via MITRE·08:19 AM
Data Sourced
via MITRE·08:19 AM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What level of access does an attacker need to exploit this issue?
The attacker needs local access and low privileges. No user interaction is required.
2
What could a successful attacker do?
They could access arbitrary physical memory or define physical-memory mappings through exposed IOCTL calls in TcRouter.sys. This can result in full compromise of the affected device.
3
How can I determine whether a system is potentially affected?
Check whether TcRouter.sys is present and in use on the system. The provided information does not identify affected versions or configurations.