# CVE-2024-51311: Tenda TX9 stack overflow in SetNetControlList

Source: https://junglewise.ai/threats/cve-2024-51311-tenda-tx9-stack-overflow-in-setnetcontrollist  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-20. Updated: 2026-07-20  
License: CC BY 4.0 with a link back

CVE-2024-51311 · Severity: info · CVSS 9.8 · Published 2026-07-20

A security vulnerability has been identified in Tenda TX9 series routers, which are used to provide wireless internet connectivity. An attacker can exploit this flaw by sending a specially crafted web request to the router's management interface. If successful, this could allow the attacker to crash the device or potentially take full control of the router, compromising the security of the network and any data passing through it.

Technologies: [Tenda TX9 Pro](https://junglewise.ai/threats/technologies/tx9-pro). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2024-51311 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-51311 being exploited in the wild.

**How severe is CVE-2024-51311?** Informational severity, with a CVSS score of 9.8, published 20 July 2026.

**Which products and versions are affected?** Tenda TX9 V22.03.02.20; Tenda TX9 Pro V22.03.02.20.

**Is there a fix for CVE-2024-51311?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2024-51311 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2024-51311?** Check whether you run Tenda TX9 or Tenda TX9 Pro at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow vulnerability exists in the 'httpd' binary of Tenda TX9/TX9 Pro firmware. The flaw is located in the 'sub_4335DC' function (called by 'sub_4337EC' or 'sub_4418CC' depending on firmware version) when processing the 'list' parameter via a POST request to the '/goform/SetNetControlList' endpoint. The application uses 'strcpy' to copy the user-controlled 'list' input into a fixed-size stack buffer without length validation. A remote, unauthenticated attacker can exploit this by sending a large payload to overwrite the return address, leading to a denial of service (system crash) or arbitrary code execution with root privileges.

## Affected products

- Tenda TX9 Pro V22.03.02.20
- Tenda TX9 V22.03.02.05

## Timeline

- 2024-10-21: disclosed: Initial researcher disclosure with PoC
- 2026-07-20: advisory: CVE published to NVD dataset

## References

- [https://gitee.com/GXB0_0/iot-vul/blob/master/Tenda/TX9/20/SetNetControlList.md](https://gitee.com/GXB0_0/iot-vul/blob/master/Tenda/TX9/20/SetNetControlList.md)
- [https://www.tendacn.com/download/detail-4515.html](https://www.tendacn.com/download/detail-4515.html)

## Related threats

- [Tenda TX9 Pro buffer overflow in SetOnlineDevName](https://junglewise.ai/threats/cve-2024-51316-tenda-tx9-pro-buffer-overflow-in-setonlinedevname)
- [Tenda TX9 Pro stack overflow in SetOnlineDevName](https://junglewise.ai/threats/cve-2024-51315-tenda-tx9-pro-stack-overflow-in-setonlinedevname)
- [Tenda TX9 Pro stack overflow in SetStaticRouteCfg](https://junglewise.ai/threats/cve-2024-51312-tenda-tx9-pro-stack-overflow-in-setstaticroutecfg)
- [Tenda TX9 Pro stack overflow in SetNetControlList](https://junglewise.ai/threats/cve-2024-51313-tenda-tx9-pro-stack-overflow-in-setnetcontrollist)