CVE-2022-29958: Jtekt Nano 10gx Tuc-1157 Firmware

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.

Affected products

  • Jtekt Nano 10gx Tuc-1157 Firmware: affected versions not specified
  • Jtekt Nano CPU Tuc-6941 Firmware: affected versions not specified
  • Jtekt PC10B-P Tcc-6373 Firmware: affected versions not specified
  • Jtekt PC10B Tcc-1021 Firmware: affected versions not specified
  • Jtekt PC10E Tcc-4737 Firmware: affected versions not specified
  • Jtekt PC10EL Tcc-4747 Firmware: affected versions not specified
  • Jtekt PC10G-CPU Tcc-6353 Firmware: affected versions not specified
  • Jtekt PC10GE Tcc-6464 Firmware: affected versions not specified
  • Jtekt PC10P-Dp-Io Tcc-6752 Firmware: affected versions not specified
  • Jtekt PC10P-Dp Tcc-6726 Firmware: affected versions not specified
  • Jtekt PC10P Tcc-6372 Firmware: affected versions not specified
  • Jtekt PC10PE-1616p Tcc-1102 Firmware: affected versions not specified
  • Jtekt PC10PE Tcc-1101 Firmware: affected versions not specified
  • Jtekt PC3JX-D Tcc-6902 Firmware: affected versions not specified
  • Jtekt PC3JX Tcc-6901 Firmware: affected versions not specified
  • Jtekt Pcdl Tkc-6688 Firmware: affected versions not specified
  • Jtekt Plus CPU Tcc-6740 Firmware: affected versions not specified

Published 2022-07-26. Last modified 2026-06-17.