CVE-2022-2081

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-04 · updated 2026-06-17
Weakness: CWE-787

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

Hitachienergy Rtu520 Firmware: from 12.0.1 through 12.0.13; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.7; from 12.7.1 through 12.7.3; from 13.2.1 through 13.2.4
Hitachienergy Rtu530 Firmware: from 12.0.1 through 12.0.13; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.7; from 12.7.1 through 12.7.3; from 13.2.1 through 13.2.4
Hitachienergy Rtu540 Firmware: from 12.0.1 through 12.0.13; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.7; from 12.7.1 through 12.7.3; from 13.2.1 through 13.2.4
Hitachienergy Rtu560 Firmware: from 12.0.1 through 12.0.13; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.7; from 12.7.1 through 12.7.3; from 13.2.1 through 13.2.4

References

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