CVE-2023-6942 Auth bypass in EZSocket

High 7.5 Published 30 Jan 2024 Updated 19 Sep 2025

Remote attackers can bypass authentication in Mitsubishi Electric industrial software to gain unauthorized access to critical functions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-6942?

CVE-2023-6942 is a high-severity authentication bypass vulnerability in Mitsubishi Electric Corporation EZSocket, published on 30 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M to 1.626C, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server DA/UA all versions allows a remote unauthenticated attacker to bypass authentication by sending specially crafted packets and connect to the products illegally.

Weakness: CWE-306

Which versions are affected by CVE-2023-6942?

It affects 10 products.

Products include Mitsubishielectric Ezsocket, Mitsubishielectric Fr Configurator2, Mitsubishielectric Got1000, Mitsubishielectric Got2000, Mitsubishielectric Gx Works2, Mitsubishielectric Gx Works3 and 4 more.

How do I fix CVE-2023-6942?

No fix has been published for CVE-2023-6942 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-6942 being exploited?

There is no known exploitation of CVE-2023-6942 in the wild and no public exploit code.

Sources

Also known as GHSA-w7vr-jmcf-cx4m.