# CVE-2026-36797: Tenda G0 stack overflow in formIPMacBindModify

Source: https://junglewise.ai/threats/cve-2026-36797-tenda-g0-stack-overflow-in-formipmacbindmodify  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-36797 · Severity: info · CVSS 7.5 · Published 2026-06-09

A security vulnerability exists in the Tenda G0 router, a device used to manage network traffic and connectivity. An attacker can send a specially crafted web request to the device's management interface to trigger a system crash. This results in a denial-of-service, cutting off internet access or network management capabilities for the organization until the device is recovered.

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

## Quick answers

**Is CVE-2026-36797 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-36797 being exploited in the wild.

**How severe is CVE-2026-36797?** Informational severity, with a CVSS score of 7.5, published 9 June 2026.

**Which products and versions are affected?** Tenda G0 v15.11.0.5.

**Is there a fix for CVE-2026-36797?** 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-2026-36797 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-36797?** 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 stack-based buffer overflow exists in the Tenda G0 v15.11.0.5 firmware within the 'formIPMacBindModify' function. The vulnerability is caused by the unsafe use of 'sprintf' when processing the 'IPMacBindRuleIp' and 'IPMacBindRuleMac' HTTP parameters retrieved via 'websGetVar'. An unauthenticated attacker can trigger this overflow by sending a crafted HTTP request with excessively long strings in these parameters. This leads to a memory corruption that causes the web service or the entire device to crash (Denial of Service). As of the advisory date, the vulnerability affects the latest version of the firmware.

## Affected products

- Tenda G0 v15.11.0.5

## Timeline

- 2026-03-17: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure
- 2026-06-09: advisory: NVD published date

## References

- [https://github.com/xhh0124/SemVulLLM/tree/main/G0/formIPMacBindModify](https://github.com/xhh0124/SemVulLLM/tree/main/G0/formIPMacBindModify)

## Related threats

- [Tenda G0 buffer overflow in setPortMapping](https://junglewise.ai/threats/cve-2026-19792-tenda-g0-buffer-overflow-in-setportmapping)
- [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)