External risk intelligence

Pegatron Tdelo64.sys Privileged Hardware Access Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-14960

The vulnerability resides in a local Windows driver (.sys) providing hardware I/O access. Exploitation requires local user-mode access to the system to interact with the device interface. It is not reachable via the public internet.

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability in Pegatron's `Tdelo64.sys` driver allows unauthorized access to hardware functions, potentially enabling system instability or persistent compromise by local attackers. The main concern is confirming relevance and exposure given the local exploitation requirement.

Driver flaw grants hardware access without checks.
Matters for potential system instability and compromise.
Confirm if this specific driver is in use.

Attack Path

How an attacker could exploit the issue

An attacker with local access could interact with a vulnerable driver on the system. This driver exposes a device interface that allows unprivileged programs to read from and write to hardware ports directly. By using this interface, an attacker can manipulate hardware registers, potentially leading to system instability, firmware tampering, or a persistent compromise.

Requires local user access.
Manipulates hardware I/O ports.
Risks system instability and compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow a local attacker to directly manipulate hardware registers and potentially compromise system stability or establish persistent low-level access by exploiting the improper handling of hardware I/O operations through the `TdeIo` device interface.

Hardware registers and firmware interfaces at risk.
Unprivileged users could read/write hardware I/O ports.
System instability or persistent low-level compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Pegatron `Tdelo64.sys` driver's improper handling of privileged hardware access requires prompt attention from teams responsible for endpoint security and device management. The first practical move is to identify all systems utilizing this driver, confirm their exposure, and then escalate to the accountable owner for risk-based remediation planning.

Endpoint security and device management teams own this.
Verify driver presence and system criticality.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Pegatron Tdelo64.sys driver?

Tdelo64.sys is a Windows kernel-mode driver developed by Pegatron. It functions as a bridge that allows the operating system to communicate directly with specific hardware components. Drivers like this are typically used to manage low-level hardware operations, such as reading or writing to device registers, which are essential for the hardware to interact correctly with the Windows environment.

What does CVE-2026-14960 mean for system security?

This vulnerability involves improper access control, categorized as CWE-269, CWE-284, and CWE-668. In plain English, the driver fails to check if a program has the proper permissions before allowing it to access hardware. Because it lacks these checks, any unprivileged user-mode application can send commands to the driver to perform arbitrary hardware input and output operations, bypassing standard system security boundaries.

How can an attacker trigger this vulnerability?

An attacker triggers this by interacting with the driver's device interface, specifically named TdeIo. This does not happen automatically. It requires an attacker to already have local access to the system, such as running a malicious program on the machine. Simply visiting a website or receiving a network packet is not enough to trigger this bug because the communication must occur locally on the host.

Is this vulnerability reachable from the internet?

According to Halo Surface Signal, this vulnerability is very unlikely to be reachable via the public internet. Because the flaw exists within a local Windows driver, it requires local user-mode access to interact with the device interface. Systems that are not physically accessible or do not allow untrusted users to run local code have a significantly reduced risk profile compared to internet-facing services.

Do I need to take action if I use this driver?

Yes, start by identifying which systems in your environment currently have Tdelo64.sys installed. Once you have an inventory, assess the criticality of those systems. Since the driver enables low-level hardware control, coordinate with your endpoint security or device management teams to plan for updates or configuration changes that restrict access to the TdeIo interface.

References

kb.cert.org/vuls/id/529388

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.