Quick answers
- Is CVE-2026-19791 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19791 being exploited in the wild.
- How severe is CVE-2026-19791?
- 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-2026-19791?
- 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-2026-19791 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-19791?
- 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 addStaticRoute function of the Tenda G0 httpd web management interface (/goform/module). The vulnerability occurs when the staticRouteNet parameter is read from user input via cJSON_GetString and formatted directly into a fixed 256-byte stack buffer using sprintf without length validation. The attack vector is network-based and requires no authentication. An attacker can exploit this by sending a POST request with an oversized staticRouteNet value to overflow the stack buffer, potentially achieving remote code execution or denial of service. Exploit code has been publicly disclosed as of 2026-08-14.
Affected products
- Tenda G0 up to 20260625
Timeline
- 2026-08-14: disclosed: Advisory published and exploit made public
- 2026-08-14: exploited: Proof-of-concept exploit code available on GitHub