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Fencer Vulns
high 7.5

CVE-2023-6942 json

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 V…

published 2024-01-30 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-59139

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-030-02 updated cvss 7.5

Mitsubishi Electric FA Engineering Software Products (Update D)

  • Mitsubishi Electric EZSocket >=3.0, <5.92
    affected: vendor fix, mitigation “Mitsubishi Electric recommends users take the following mitigation measures to minimize the risk of exploiting these vulnerabilities:” mitsubishielectric.com
  • Mitsubishi Electric GT Designer3 Version1(GOT1000) <=1.325P Mitsubishi Electric GT Designer3 Version1(GOT2000) <=1.320J
    affected: mitigation “Mitsubishi Electric recommends users take the following mitigation measures to minimize the risk of exploiting these vulnerabilities:” mitsubishielectric.com
  • Mitsubishi Electric GX Works2 >=1.11M, <1.626C Mitsubishi Electric GX Works3 <=1.106L Mitsubishi Electric MELSOFT Navigator >=1.04E, <2.102G Mitsubishi Electric MT Works2 <=1.190Y Mitsubishi Electric MX Component >=4.00A, <5.007H
    affected: vendor fix, mitigation “Mitsubishi Electric recommends users take the following mitigation measures to minimize the risk of exploiting these vulnerabilities:” mitsubishielectric.com
  • Mitsubishi Electric MX OPC Server DA/UA (Software packaged with MC Works64)
    affected: mitigation “Mitsubishi Electric recommends users take the following mitigation measures to minimize the risk of exploiting these vulnerabilities:” mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Mitsubishi Electric Corporation EZSocket
  • Mitsubishi Electric Corporation GT Designer3 Version1(GOT1000)
  • Mitsubishi Electric Corporation GT Designer3 Version1(GOT2000)
  • Mitsubishi Electric Corporation GX Works2
  • Mitsubishi Electric Corporation GX Works3
  • Mitsubishi Electric Corporation MELSOFT Navigator
  • Mitsubishi Electric Corporation MT Works2
  • Mitsubishi Electric Corporation MX Component
  • Mitsubishi Electric Corporation MX OPC Server DA/UA

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.