CVE-2022-2081
CVE-2022-2081 is a high-severity vulnerability in Hitachienergy Rtu520 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (46th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2022-34371
- Weakness: CWE-787
- Affected product: Hitachienergy Rtu520 Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2022-2081?
- 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.
- How severe is CVE-2022-2081?
- CVE-2022-2081 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2022-2081 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-2081?
- CVE-2022-2081 primarily affects Hitachienergy Rtu520 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-2081?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2022-2081 have an EU (EUVD) identifier?
- Yes. CVE-2022-2081 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-34371.
- When was CVE-2022-2081 published?
- CVE-2022-2081 was published on 2024-01-04 and last updated on 2026-06-17.
References
Affected products (8)
- cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu520_firmware:13.3.1:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu530_firmware:13.3.1:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu540_firmware:13.3.1:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:hitachienergy:rtu560_firmware:13.3.1:*:*:*:*:*:*:*
More vulnerabilities in Hitachienergy Rtu520 Firmware
- CVE-2026-1773 — High (CVSS 7.5): IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is…
- CVE-2023-5767 — Medium (CVSS 6.0): A vulnerability exists in the webserver that affects the RTU500 series product versions listed below. A malicious…
- CVE-2023-5768 — Medium (CVSS 5.9): A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below.…
- CVE-2023-5769 — Medium (CVSS 5.4): A vulnerability exists in the webserver that affects the RTU500 series product versions listed below. A malicious…
- CVE-2026-1772 — Medium (CVSS 5.3): RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via…
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