CVE-2021-33011: Jtekt 2port-Efr Thu-6404 Firmware

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

All versions of the afffected TOYOPUC-PC10 Series,TOYOPUC-Plus Series,TOYOPUC-PC3J/PC2J Series, TOYOPUC-Nano Series products may not be able to properly process an ICMP flood, which may allow an attacker to deny Ethernet communications between affected devices.

Affected products

• Jtekt 2port-Efr Thu-6404 Firmware: any version
• Jtekt EF10 Tcu-6982 Firmware: any version
• Jtekt Fl/et-T-v2h Thu-6289 Firmware: any version
• Jtekt Nano 10gx Tuc-1157 Firmware: any version
• Jtekt Nano 2et Tuu-6949 Firmware: any version
• Jtekt Nano CPU Tuc-6941 Firmware: any version
• Jtekt Nano Safety RS00IP Tuu-1086 Firmware: any version
• Jtekt Nano Safety RS01IP Tuu-1087 Firmware: any version
• Jtekt Nano Safety Tuc-1085 Firmware: any version
• Jtekt PC10B-E/c Tcu-6521 Firmware: any version
• Jtekt PC10B-P Tcc-6373 Firmware: any version
• Jtekt PC10B Tcc-1021 Firmware: any version
• Jtekt PC10E Tcc-4637 Firmware: any version
• Jtekt PC10G-CPU Tcc-6353 Firmware: any version
• Jtekt PC10GE Tcc-6464 Firmware: any version
• Jtekt PC10P-Dp-Io Tcc-6752 Firmware: any version
• Jtekt PC10P-Dp Tcc-6726 Firmware: any version
• Jtekt PC10P Tcc-6372 Firmware: any version
• Jtekt PC10PE-1616p Tcc-1102 Firmware: any version
• Jtekt PC10PE Tcc-1101 Firmware: any version
• Jtekt Plus 2p-Efr Tcu-6929 Firmware: any version
• Jtekt Plus Bus-Ex Tcu-6900 Firmware: any version
• Jtekt Plus CPU Tcc-6740 Firmware: any version
• Jtekt Plus EFR2 Tcu-6859 Firmware: any version
• Jtekt Plus Efr Tcu-6743 Firmware: any version
• and 2 more

Published 2021-09-10. Last modified 2026-06-17.