---
id: "CVE-2013-20007"
kind: "vulnerability"
aliases: ["CVE-2013-20007"]
title: "Linksys WAG200G router: authenticated command injection gives full device control"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "WAG200G", "fixed": [], "affected": "<= 1.01.06", "ecosystem": "vendor"}]
ecosystems: []
tags: ["command-injection", "end-of-life", "infrastructure", "linksys", "router", "self-hosted", "wag200g"]
not_affected_if: ["admin-not-exposed", "auth-required", "firmware-newer-than-1.01.06", "other-models", "remote-management-disabled"]
published_at: "2026-10-28T03:17:07+00:00"
first_seen_at: "2026-10-28T03:31:01+00:00"
updated_at: "2026-10-28T03:33:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-20007", "first_seen_at": "2026-10-28T03:31:01+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-28T03:33:15+00:00"}]
---

# Linksys WAG200G router: authenticated command injection gives full device control

Linksys WAG200G firmware through 1.01.06 passes backtick-delimited input in the timer_interval parameter of setup.cgi to the operating system shell. An authenticated attacker can run commands, start telnetd or download and run a backdoor, and gain full control of the device.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:WAG200G affected <= 1.01.06 fixed ?

## How to check

Open the router admin page, Status, and read the firmware version: v1.01.06 or earlier is vulnerable. Check that remote management is off and the admin page is not reachable from the internet (a Shodan search for WAG200G lists exposed units).

## Fix

No fix exists as far as sources say (researcher: no known solution; Linksys closed the case without a patch). Replace the device, or restrict the admin interface to a trusted LAN, disable remote management and change the default admin password.

## Timeline

- 2026-10-28T03:31:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2013-20007
- 2026-10-28T03:33:15+00:00 analyst — Read researcher advisory (bugtraq, Messner 2013-02): only v1.01.06 listed, 'no known solution', Linksys closed case; public PoC on Exploit-DB 24476. No vendor page found; device is old/EOL, no fix.

## Documents

- [advisory] Bugtraq: Multiple Vulnerabilities in Linksys WAG200G (Michael Messner) https://lists.openwall.net/bugtraq/2013/02/11/6
- [poc] Exploit-DB 24476: Linksys WAG200G Multiple Vulnerabilities https://www.exploit-db.com/exploits/24476

## From the sources

Linksys WAG200G through 1.01.06 contains an OS command injection vulnerability that allows authenticated attackers to execute commands by injecting backtick-delimited input into the timer_interval parameter. Attackers can send a crafted POST request to setup.cgi to start telnetd or download and run a backdoor, gaining full device control.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_