Moxa MxGeneralIo up to 1.3.x/1.4.x on Moxa exposed ioctl with insufficient access control

Summaryinfo

A vulnerability was found in Moxa MxGeneralIo up to 1.3.x/1.4.x on Moxa. It has been rated as problematic. This issue affects some unknown processing. This manipulation causes exposed ioctl with insufficient access control. This vulnerability is handled as CVE-2026-4483. It is possible to launch the attack on the local host. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Moxa MxGeneralIo up to 1.3.x/1.4.x on Moxa. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a exposed ioctl with insufficient access control vulnerability. The CWE definition for the vulnerability is CWE-782. The product implements an IOCTL with functionality that should be restricted, but it does not properly enforce access control for the IOCTL. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An exposed IOCTL with an  insufficient access control vulnerability has been identified in the utility, MxGeneralIo, for Moxa’s industrial x86 computers. The affected utility, MxGeneralIo, exposes IOCTL methods that permit direct read and write access to MSR and system memory. A local attacker with high privileges could abuse these interfaces to perform unauthorized operations. Successful exploitation may result in privilege escalation on Windows 7 systems or cause a system crash (BSoD) on Windows 10 and 11 systems, leading to a denial-of-service condition. The vulnerability could slightly affect the confidentiality and integrity of the device, but availability might be heavily impacted. No impact to the subsequent system has been identified.

The weakness was released by Jason Huang. The advisory is shared at moxa.com. This vulnerability is known as CVE-2026-4483 since 03/20/2026. The exploitation appears to be easy. An attack has to be approached locally. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.4.0 or 1.5.0 eliminates this vulnerability.

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Productinfo

Type

• Automation Software

Vendor

• Moxa

Name

• MxGeneralIo

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4

License

• commercial

Website

• Vendor: https://www.moxa.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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