CVE-2026-4483
Insufficient Access Control in MxGeneralIo Causes Privilege Escalation and DoS
Publication date: 2026-04-08
Last updated on: 2026-04-08
Assigner: Moxa Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| moxa | mxgeneralio | to 1.4.0 (exc) |
| moxa | mxgeneralio | to 1.5.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-782 | The product implements an IOCTL with functionality that should be restricted, but it does not properly enforce access control for the IOCTL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-4483 is a high-severity vulnerability found in the utility MxGeneralIo used in Moxa’s industrial x86 computers. It involves exposed IOCTL (Input Output Control) methods that lack sufficient access control, allowing direct read and write access to Model-Specific Registers (MSR) and system memory.
A local attacker with high privileges can exploit these exposed IOCTL interfaces to perform unauthorized operations. Depending on the operating system, exploitation can lead to privilege escalation on Windows 7 systems or cause a system crash (Blue Screen of Death) on Windows 10 and 11 systems.
How can this vulnerability impact me? :
Successful exploitation of this vulnerability can result in privilege escalation on Windows 7 systems, allowing an attacker to gain higher-level access than intended.
On Windows 10 and 11 systems, exploitation may cause a system crash leading to a Blue Screen of Death (BSoD), which results in a denial-of-service (DoS) condition.
The vulnerability primarily impacts system availability heavily, with minor potential effects on confidentiality and integrity of the device. No impact on subsequent systems has been identified.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
Detection of this vulnerability involves monitoring for anomalies related to the exposed IOCTL interfaces in the MxGeneralIo utility. Since the vulnerability allows direct read and write access to MSR and system memory via IOCTL calls, detection can focus on unusual IOCTL activity or unauthorized access attempts.
While specific commands are not provided in the resources, general approaches include enabling logging and audit trails on the affected systems to capture IOCTL calls, monitoring for privilege escalation attempts, and checking for system crashes (BSoD) on Windows 10 and 11 systems that may indicate exploitation.
Network monitoring can include inspecting traffic for unauthorized access attempts to the MxGeneralIo utility, especially from local users with high privileges.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include applying the security patches released by Moxa: MxGeneralIo_Win7_V1.4.0_x86 and x64 for Windows 7, and MxGeneralIo_V1.5.0_W10_W11 for Windows 10 and 11.
- Restrict network access to affected devices using firewalls or access control lists (ACLs).
- Segregate operational networks to limit exposure.
- Disable unused services and close unnecessary ports on the devices.
- Implement multi-factor authentication and role-based access control to limit high privilege access.
- Maintain regular firmware and software updates.
- Secure remote access using encrypted protocols and strong authentication.
- Monitor for anomalies and enable logging and audit trails to detect potential exploitation.
- Conduct regular security assessments to identify and address vulnerabilities.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability primarily impacts system availability by enabling denial-of-service conditions and may slightly affect confidentiality and integrity. However, there is no direct information provided about its effects on compliance with common standards and regulations such as GDPR or HIPAA.