CVE-2026-14961

Deferred Deferred - Pending Action

Privileged IOCTL Access in Pegatron Tdelo64.sys

Publication date: 2026-07-15

Last updated on: 2026-07-15

Assigner: CERT/CC

Description

Pegatron `Tdelo64.sys` exposes a privileged device interface, `\\.\TdeIo`, that fails to properly restrict access to sensitive IOCTL functionality. The driver's IOCTL dispatcher does not validate caller privileges or verify user-supplied kernel memory addresses before performing memory operations. By sending crafted requests to IOCTL, a local attacker can achieve arbitrary kernel memory read and write operations, leading to privilege escalation to `NT AUTHORITY\SYSTEM`, security product bypass, credential theft, or complete system compromise.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-15

Last Modified

2026-07-15

Generated

2026-08-05

AI Q&A

2026-07-16

EPSS Evaluated

2026-08-03

NVD

CVE-2026-14961

EUVD

EUVD-2026-44731

Affected Vendors & Products

Vendor	Product	Version / Range
pegatron	tdeio64.sys	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves the Pegatron Tdelo64.sys driver exposing a privileged device interface that does not properly restrict access to sensitive IOCTL functions. The driver fails to validate caller privileges or user-supplied kernel memory addresses, allowing arbitrary kernel memory read and write operations through crafted requests.

Detection Guidance

To detect this vulnerability, check for the presence of the vulnerable driver file Tdelo64.sys in the system's driver directory. Use commands like 'where /r C:\ Tdelo64.sys' or 'dir /s C:\ Tdelo64.sys' to locate it. Additionally, monitor for unusual IOCTL requests to the \\.\TdeIo interface using tools like Process Monitor or Windows Event Tracing.

Impact Analysis

An attacker could exploit this to escalate privileges to SYSTEM level, bypass security products, steal credentials, or fully compromise the system. This could allow installation of malware, disabling protections, or accessing sensitive data.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, privilege escalation, and system compromise, which may violate compliance requirements under GDPR (data protection), HIPAA (health information security), and other regulations that mandate strong access controls and protection against unauthorized system access.

Mitigation Strategies

Immediately disable or remove the vulnerable driver Tdelo64.sys from your system. Restrict untrusted user access to the driver interface. Enable Windows Defender Application Control (WDAC) or Hypervisor-Protected Code Integrity (HVCI) to prevent the driver from loading. Block the driver's execution via Group Policy or endpoint protection solutions.

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