# CVE-2026-36801: Tenda G0 buffer overflow in formIPMacBindAdd

Source: https://junglewise.ai/threats/cve-2026-36801-tenda-g0-buffer-overflow-in-formipmacbindadd  
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-2026-36801 · Severity: info · CVSS 7.5 · Published 2026-06-09

A security vulnerability has been identified in the Tenda G0 router, a device used to manage network traffic and security for small businesses or home offices. An attacker can exploit this flaw by sending a specially crafted web request to the device, causing it to crash or become unstable. This results in a denial of service, potentially disrupting internet connectivity and business operations until the device is restarted.

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

## Quick answers

**Is CVE-2026-36801 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-36801 being exploited in the wild.

**How severe is CVE-2026-36801?** 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-2026-36801?** 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-2026-36801 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-36801?** 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 router firmware version v15.11.0.5. The vulnerability is located within the formIPMacBindAdd function, where the user-supplied HTTP parameter 'IPMacBindRule' is retrieved via websGetVar and subsequently passed to the ipMacBindListStore function. Inside ipMacBindListStore, the input is processed using an unsafe strcpy() call into a fixed-size stack buffer (acStack_11a20) without length validation. A remote attacker can exploit this by sending a crafted HTTP request with an oversized IPMacBindRule string, leading to a process crash or device instability (Denial of Service). The vulnerable path is reportedly reachable without complex preconditions.

## 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/formIPMacBindAdd](https://github.com/xhh0124/SemVulLLM/tree/main/G0/formIPMacBindAdd)

## 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 formIPMacBindDel](https://junglewise.ai/threats/cve-2026-36800-tenda-g0-buffer-overflow-in-formipmacbinddel)