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High severity7.5NVD Advisory· Published Jan 4, 2024· Updated Jun 17, 2026

CVE-2022-2081

CVE-2022-2081

Description

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.

Affected products

10
  • Hitachienergy/Rtu520 Firmware2 versions
    cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*range: >=12.0.1,<=12.0.13
    • cpe:2.3:o:hitachienergy:rtu520_firmware:13.3.1:*:*:*:*:*:*:*
  • Hitachienergy/Rtu530 Firmware2 versions
    cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*range: >=12.0.1,<=12.0.13
    • cpe:2.3:o:hitachienergy:rtu530_firmware:13.3.1:*:*:*:*:*:*:*
  • Hitachienergy/Rtu540 Firmware2 versions
    cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*range: >=12.0.1,<=12.0.13
    • cpe:2.3:o:hitachienergy:rtu540_firmware:13.3.1:*:*:*:*:*:*:*
  • Hitachienergy/Rtu560 Firmware2 versions
    cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*range: >=12.0.1,<=12.0.13
    • cpe:2.3:o:hitachienergy:rtu560_firmware:13.3.1:*:*:*:*:*:*:*
  • Hitachi/RTU500llm-fuzzy
  • Hitachi Energy/RTU500 series CMU firmwarev5
    Range: 12.0.1.0

Patches

Vulnerability mechanics

References

1

News mentions

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