CVE-2026-4483 Privilege escalation in MxGeneralIo
A local attacker with high privileges can exploit exposed IOCTLs in MxGeneralIo to escalate privileges or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4483?
CVE-2026-4483 is a high-severity vulnerability in Moxa MxGeneralIo, published on 8 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-782
Which versions are affected by CVE-2026-4483?
How do I fix CVE-2026-4483?
No fix has been published for CVE-2026-4483 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4483 being exploited?
There is no known exploitation of CVE-2026-4483 in the wild and no public exploit code.
Sources
Also known as GHSA-9fq9-vh4p-342c.