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Fencer Vulns
critical 10.0

CVE-2023-4699 json

Arbitrary Command Execution Vulnerability in Mitsubishi Electric proprietary protocol communication of multiple FA products

published 2023-11-06 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-54547

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation MELSEC-F Series CPU modules, MELSEC iQ-F Series, MELSEC iQ-R series CPU modules, MELSEC iQ-R series, MELSEC iQ-L series, MELSEC Q series, MELSEC-L series, Mitsubishi Electric CNC M800V/M80V series, Mitsubishi Electric CNC M800/M80/E80 series and Mitsubishi Electric CNC M700V/M70V/E70 series allows a remote unauthenticated attacker to execute arbitrary commands by sending specific packets to the affected products. This could lead to disclose or tamper with information by reading or writing control programs, or cause a denial-of-service (DoS) condition on the products by resetting the memory contents of the products to factory settings or resetting the products remotely.

Vendor advisories

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

cisa ICSA-23-306-03 updated cvss 10.0

Mitsubishi Electric FA products (Update A)

  • Mitsubishi Electric Corporation MELSEC iQ-F series FX5-40SSC-G Mitsubishi Electric Corporation MELSEC iQ-F series FX5-40SSC-S Mitsubishi Electric Corporation MELSEC iQ-F series FX5-80SSC-G Mitsubishi Electric Corporation MELSEC iQ-F series FX5-80SSC-S Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-30MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-30MT/ES
    +34 more products
    Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-30MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-40MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-40MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-40MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-60MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-60MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-60MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-80MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-80MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5S-80MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MR/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MT/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-32MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MR/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MT/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-64MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MR/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MR/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MT/DS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MT/ES Mitsubishi Electric Corporation MELSEC iQ-F series FX5U-80MT/ESS Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-32MR/DS-TS Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-32MT/D Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-32MT/DS-TS Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-32MT/DSS Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-32MT/DSS-TS Mitsubishi Electric Corporation MELSEC iQ-F series FX5UC-64MT/D
    affected: mitigation “Mitsubishi Electric recommends that customers take the following mitigation measures to minimize the risk of exploiting this vulnerability:” mitsubishielectric.com

207 more affected in the full advisory

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
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MR/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ESS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MR/DS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/DSS
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/UA1
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/UA1
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MS/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MS/ES
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-80MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-128MT/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-16MR/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-32MR/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-48MR/ES-A
  • Mitsubishi Electric Corporation MELSEC-F Series FX3U-64MR/ES-A

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-345 Insufficient Verification of Data Authenticity

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.