# CVE-2026-10188: Tenda W12 stack buffer overflow in cgistaKickOff

Source: https://junglewise.ai/threats/cve-2026-10188-tenda-w12-stack-buffer-overflow-in-cgistakickoff  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-31. Updated: 2026-05-31  
License: CC BY 4.0 with a link back

CVE-2026-10188 · Severity: high · CVSS 8.8 · Published 2026-05-31

A security vulnerability has been identified in the Tenda W12 wireless router, a device used to provide internet connectivity in homes and small offices. An attacker can exploit this flaw to crash the device or potentially take full control of it by sending a specially crafted request. This could lead to a complete loss of internet service or unauthorized access to the network traffic passing through the router.

Technologies: [Tenda W12](https://junglewise.ai/threats/technologies/w12). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-10188 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10188 being exploited in the wild.

**How severe is CVE-2026-10188?** High severity, with a CVSS score of 8.8, published 31 May 2026.

**Which products and versions are affected?** Tenda W12 3.0.0.7(4763).

**Is there a fix for CVE-2026-10188?** 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-2026-10188 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-10188?** Check whether you run Tenda W12 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 (CWE-121) exists in the Tenda W12 router firmware version 3.0.0.7(4763). The flaw is located in the 'cgistaKickOff' function within the '/bin/httpd' binary. The vulnerability is triggered by insufficient validation of the 'staMac' parameter, allowing an attacker to overwrite the stack. While the attack requires low-level authentication (PR:L), it can be executed remotely over the network. Successful exploitation can lead to remote code execution (RCE) or a denial-of-service (DoS) condition. Public exploit code has reportedly been released.

## Affected products

- Tenda W12 3.0.0.7(4763)

## Timeline

- 2026-05-31: disclosed
- 2026-05-31: advisory

## References

- [http://cdn2.v50to.cc/Tenda%20W12%20cgistaKickOff%20overflow.zip](http://cdn2.v50to.cc/Tenda%20W12%20cgistaKickOff%20overflow.zip)
- [https://vuldb.com/cve/CVE-2026-10188](https://vuldb.com/cve/CVE-2026-10188)
- [https://vuldb.com/submit/820018](https://vuldb.com/submit/820018)
- [https://vuldb.com/vuln/367469](https://vuldb.com/vuln/367469)
- [https://vuldb.com/vuln/367469/cti](https://vuldb.com/vuln/367469/cti)
- [https://www.tenda.com.cn/](https://www.tenda.com.cn/)

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