Hitachi Energy Rtu500 Series CMU vulnerabilities
13 vulnerabilities
Known vulnerabilities in Hitachi Energy Rtu500 Series CMU, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2022-2081hitachi energyrtu500 series cmu firmware+4
EPSS score0.64%
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.CVE-2022-28613abbrtu500_firmware+2EPSS score0.99%
A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is en-abled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500, causing the receiving RTU500 CMU to reboot. The vulnerability is caused by the validation error in the length information carried in MBAP header in the HCI Modbus TCP function.CVE-2024-2617hitachi energyrtu500 series cmu firmwareEPSS score0.66%
A vulnerability exists in the RTU500 that allows for authenticated and authorized users to bypass secure update,
if secure update feature was not enabled on all
CMUs of a RTU500. If a
malicious actor successfully exploits this vulnerability, they
could use it to update the RTU500 with unsigned firmware.CVE-2024-1532hitachi energyrtu500 series cmu firmwareEPSS score0.57%
A vulnerability exists in the stb-language file handling that affects the RTU500 series product versions listed below. A malicious actor could enforce diagnostic texts being displayed as empty strings, if an authorized user uploads a specially crafted stb-language file.CVE-2024-1531hitachi energyrtu500 series cmu firmwareEPSS score0.45%
A vulnerability exists in the stb-language file handling that affects the RTU500 series product versions listed below. A malicious actor could print random memory content in the RTU500 system log, if an authorized user uploads a specially crafted stb-language file.CVE-2026-1773hitachi energyrtu500 series cmu firmware+4EPSS score0.43%
IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation.CVE-2026-1772hitachi energyrtu500 series cmu firmware+4EPSS score0.28%
RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface but requires further tools like browser development utilities to access them without required privileges.CVE-2026-17539hitachi energyrtu500 series cmu firmwareEPSS score0.27%
RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.CVE-2026-8479hitachi energyrtu500 series cmu firmwareEPSS score0.25%
IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable
for a NULL pointer dereferencing, if a specially crafted
sequence of messages is sent for a certain time, causing
Denial of Service impact.
Product is only affected if IEC 60870-5-104 functionality in
bidirectional mode (BCI) is configured.CVE-2026-8065hitachi energyrtu500 series cmu firmwareEPSS score0.58%
An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device.CVE-2026-8067hitachi energyrtu500 series cmu firmwareEPSS score0.32%
An improper authorization vulnerability in the end-of-life versions of RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset endpoint. Successful exploitation could cause temporary device unavailability and disruption of its intended operation.CVE-2026-8066hitachi energyrtu500 series cmu firmwareEPSS score0.74%
A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation.CVE-2023-6711hitachi energyrtu500 series cmu firmware+1EPSS score0.67%
Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Specially crafted messages sent to the mentioned components are not validated properly and can result in buffer overflow and as final consequence to a reboot of an RTU500 CMU.