Quick answers
- Is CVE-2026-36796 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36796 being exploited in the wild.
- How severe is CVE-2026-36796?
- Informational severity, with a CVSS score of 9.8, published 9 June 2026.
- Which products and versions are affected?
- Tenda G0 v15.11.0.5.
- Is there a fix for CVE-2026-36796?
- 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-2026-36796 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-36796?
- 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 'formCropAndSetWewifiPic' function. The vulnerability is triggered when the 'picCropName' HTTP parameter, retrieved via 'websGetVar', is passed to 'sprintf' and 'snprintf' without adequate length validation. An attacker can exploit this by sending a crafted HTTP request with an excessively long string (e.g., over 800 characters) to the affected CGI endpoint. This can lead to a process crash (Denial of Service) or arbitrary code execution with the privileges of the web service. While the NVD entry focuses on DoS, researcher analysis indicates the potential for full system compromise via command injection or stack smashing.
Affected products
- Tenda G0 v15.11.0.5
Timeline
- 2026-03-17: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure of vulnerability details
- 2026-06-09: advisory: NVD published CVE-2026-36796