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Vulnerability record · CVE-2022-2081 · published 4 January 2024

CVE-2022-2081: Hitachienergy rtu520 firmware out-of-bounds write vulnerability

Hitachienergy · Rtu520 Firmware

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.

7.5 CVSS 3.1 High EPSS 0.64% · top 51.6% CWE-787 · Out-of-bounds write
7.5CVSS 3.1 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000111&LanguageCode=en&DocumentPartId=&Action=Launch Vendor Advisory
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000111&LanguageCode=en&DocumentPartId=&Action=Launch Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-1773Hitachienergy rtu540 firmware vulnerabilityIEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-10…EPSS 0.42%6.1CVE-2023-5769Hitachienergy rtu520 firmware cross-site scripting vulnerabilityA vulnerability exists in the webserver that affects the RTU500 series product versions listed below. A malicious actor could perform cross-site scri…EPSS 0.41%6.1CVE-2023-5767Hitachienergy rtu520 firmware cross-site scripting vulnerabilityA vulnerability exists in the webserver that affects the RTU500 series product versions listed below. A malicious actor could perform cross-site scri…EPSS 0.39%6.1CVE-2023-5768Hitachienergy rtu520 firmware cross-site scripting vulnerabilityA vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Incomplete or wrong received APDU fra…EPSS 0.41%5.3CVE-2026-1772Hitachienergy rtu520 firmware vulnerabilityRTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface…EPSS 0.27%8.8CVE-2026-86950Apple ipados out-of-bounds write vulnerabilityAn out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, …KEV8.8CVE-2026-53266Linux kernel ebtables SNAT out-of-bounds write in ARP rewriteThe ebtables SNAT target rewrites the ARP sender hardware address via skb_store_bits() without first making that range writable. When the ARP SHA byt…KEVEPSS 0.65%analysed8.8CVE-2026-87491Google Chrome V8 out-of-bounds write enables sandbox code executionChrome before 153.0.8010.36 contains an out-of-bounds write in the V8 JavaScript engine. A crafted HTML page can trigger the memory corruption, and b…KEVEPSS 3.1%analysed

Source: NIST National Vulnerability Database (record CVE-2022-2081), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.