# CVE-2026-19792: Tenda G0 buffer overflow in setPortMapping

Source: https://junglewise.ai/threats/cve-2026-19792-tenda-g0-buffer-overflow-in-setportmapping  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-14. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19792 · Severity: high · CVSS 8.8 · Published 2026-08-14

The Tenda G0 is a network appliance with a web-based management interface. A buffer overflow vulnerability exists in the port mapping configuration function that allows remote attackers to send specially crafted requests without authentication, potentially leading to code execution and complete device compromise.

Technologies: [Tenda G0](https://junglewise.ai/threats/technologies/g0). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-19792 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19792 being exploited in the wild.

**How severe is CVE-2026-19792?** High severity, with a CVSS score of 8.8, published 14 August 2026.

**Which products and versions are affected?** Tenda G0 up to 20260625.

**Is there a fix for CVE-2026-19792?** 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-2026-19792 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-19792?** Check whether you run Tenda G0 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 buffer overflow vulnerability exists in the setPortMapping function of the Tenda G0 httpd web management interface (/goform/module). The vulnerability stems from unsafe use of sprintf() to write attacker-controlled parameters (portMappingServer, porMappingtInternal, portMappingExternal) into a fixed 256-byte stack buffer without length validation. An attacker can send a specially crafted HTTP request with oversized values for these parameters to overflow the buffer. The attack is network-reachable and does not require authentication. Successful exploitation allows arbitrary code execution on the device. Public exploits have been released.

## Affected products

- Tenda G0 up to 20260625

## Timeline

- 2026-08-14: disclosed
- exploited: Public exploit released

## References

- [https://github.com/lipenghai/iot_bug/blob/main/Tenda/G0/3.md](https://github.com/lipenghai/iot_bug/blob/main/Tenda/G0/3.md)
- [https://vuldb.com/cve/CVE-2026-19792](https://vuldb.com/cve/CVE-2026-19792)

## Related threats

- [Tenda G0 stack buffer overflow in addStaticRoute](https://junglewise.ai/threats/cve-2026-19791-tenda-g0-stack-buffer-overflow-in-addstaticroute)
- [Tenda G0 stack buffer overflow in port mirror handler](https://junglewise.ai/threats/cve-2026-19790-tenda-g0-stack-buffer-overflow-in-port-mirror-handler)
- [Tenda G0 and PW201A buffer overflow in Saveqqlist function](https://junglewise.ai/threats/cve-2026-36805-tenda-g0-and-pw201a-buffer-overflow-in-saveqqlist-function)
- [Tenda G0 buffer overflow in formIPMacBindAdd](https://junglewise.ai/threats/cve-2026-36801-tenda-g0-buffer-overflow-in-formipmacbindadd)
- [Tenda G0 buffer overflow in formIPMacBindDel](https://junglewise.ai/threats/cve-2026-36800-tenda-g0-buffer-overflow-in-formipmacbinddel)