CVE-2023-27396: Omron CJ2H-CPU64-Eip Firmware

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

FINS (Factory Interface Network Service) is a message communication protocol, which is designed to be used in closed FA (Factory Automation) networks, and is used in FA networks composed of OMRON products. Multiple OMRON products that implement FINS protocol contain following security issues -- (1)Plaintext communication, and (2)No authentication required. When FINS messages are intercepted, the contents may be retrieved. When arbitrary FINS messages are injected, any commands may be executed on, or the system information may be retrieved from, the affected device. Affected products and versions are as follows: SYSMAC CS-series CPU Units, all versions, SYSMAC CJ-series CPU Units, all versions, SYSMAC CP-series CPU Units, all versions, SYSMAC NJ-series CPU Units, all versions, SYSMAC NX1P-series CPU Units, all versions, SYSMAC NX102-series CPU Units, all versions, and SYSMAC NX7 Database Connection CPU Units (Ver.1.16 or later)

Affected products

  • Omron CJ2H-CPU64-Eip Firmware: affected versions not specified
  • Omron CJ2H-CPU64 Firmware: affected versions not specified
  • Omron CJ2H-CPU65-Eip Firmware: affected versions not specified
  • Omron CJ2H-CPU65 Firmware: affected versions not specified
  • Omron CJ2H-CPU66-Eip Firmware: affected versions not specified
  • Omron CJ2H-CPU66 Firmware: affected versions not specified
  • Omron CJ2H-CPU67-Eip Firmware: affected versions not specified
  • Omron CJ2H-CPU67 Firmware: affected versions not specified
  • Omron CJ2H-CPU68-Eip Firmware: affected versions not specified
  • Omron CJ2H-CPU68 Firmware: affected versions not specified
  • Omron CJ2M-CPU11 Firmware: affected versions not specified
  • Omron CJ2M-CPU12 Firmware: affected versions not specified
  • Omron CJ2M-CPU13 Firmware: affected versions not specified
  • Omron CJ2M-CPU14 Firmware: affected versions not specified
  • Omron CJ2M-CPU15 Firmware: affected versions not specified
  • Omron CJ2M-CPU31 Firmware: affected versions not specified
  • Omron CJ2M-CPU32 Firmware: affected versions not specified
  • Omron CJ2M-CPU33 Firmware: affected versions not specified
  • Omron CJ2M-CPU34 Firmware: affected versions not specified
  • Omron CJ2M-CPU35 Firmware: affected versions not specified
  • Omron CJ2M-MD211 Firmware: affected versions not specified
  • Omron CJ2M-MD212 Firmware: affected versions not specified
  • Omron CP1E-e10dr-A Firmware: affected versions not specified
  • Omron CP1E-e10dr-D Firmware: affected versions not specified
  • Omron CP1E-e10dt-A Firmware: affected versions not specified
  • and 246 more

Published 2023-06-19. Last modified 2026-06-17.